Click here to Skip to main content
Click here to Skip to main content

Balloon Help as a non-modal replacement for MessageBox()

, 7 Aug 2002
Rate this:
Please Sign up or sign in to vote.
Although sometimes useful, message boxes used to display information are often just annoying. This article describes a non-modal replacement.
Release #3: Previous release: Ports:

Update Notes

The primary reason for this release is a bug I found with the open location feature: it would access deallocated memory! In addition, I've worked in a few other changes to make writing custom LaunchBalloon() methods easier, fixed a bug in the demo, and added two new options:

unDELAY_CLOSE works in tandem with a timeout value to delay the action caused by the other unCLOSE_* options. This allows you to keep a balloon active indefinately (until the user gets back from coffee break, etc. and has time to take a look at it). For long timeout values, I'd advise also using unSHOW_CLOSE_BUTTON so the user can still get rid of it quickly if need be.

unDISABLE_XP_SHADOW is exactly what it sounds like: if set, that cool dropshadow XP uses for tooltips and menus isn't shown. Note that the user can also disable dropshadows globally, in which case this option has no effect.

I want to add some new demos, there are more things that can be done with this than what I'm currently demonstrating, but I felt these bug fixes needed to be released, and I'm probably too lazy to get the demos done as soon as i'd like anyway. So, I'll do another update when they are finished. In the meantime, Rama Krishna either has already, or will soon be releasing his .NET Version, so there'll be plenty of Balloon Goodness around. Smile | :)

Balloons
CBalloonHelp test app, running under Windows XP.

Introduction
Using CBalloonHelp
API
   Important stuff
   SetAnchorPoint()
   SetBackgroundColor()
   SetForegroundColor()
   SetTitle()
   SetContent()
   SetTitleFont()
   SetContentFont()
   SetURL()
   SetIcon()
   LaunchBalloon()
Features
Compatibility
Internals
Updates
Related Articles
TODO
Thanks

Introduction

I hate message boxes.

Or really, I hate MessageBox()s. Something about having a form of output sooo convenient, a single function call, no need for resources to be added, for interfaces to be designed, for any planning or preparation at all – not even a window handle is needed (!) – seems almost to force programmers to use it whenever there is any doubt about what the user should know. Is there a chance a user will perform an action in error? Better get confirmation... Just pop up a MessageBox()!  I can't delete a file in the windows explorer without having to click through at least one MessageBox(). Am I sure? But, the file is executable... Am i really sure? But, it might affect registered programs... Am I really, really sure? ... If a check box was provided to let you hide the message in the future... But that would require extra effort, and there's this ready to use, almost good enough function that will suffice...

But worse yet are programs that feel the need to inform you, after performing an action that you explicitly requested, that the action has indeed been performed, using – you guessed it – MessageBox(). Nothing wrong with a little feedback, especially if the action had effects not necessarily intuitive to first-time users, but to do it in a way that requires you to stop what you're doing, (and what is sometimes worse, what the program is doing) just to acknowledge it... That is not funny.

OK...

Enough hypocritical griping however. Solutions do exist – creating message boxes with check boxes or “yes to all” / “no to all” buttons is not difficult. For the purpose of feedback, displaying a short message in a status bar will often suffice, or possibly adding a log pane. But both of these options really only work for the main window of an application, and have other drawbacks in terms of visibility and screen real-estate as well.

With Windows 2000, Microsoft began a practice of using balloons (of the comic strip dialog variety) for displaying messages from system tray icons. This seems to work quite well; when I dial into the Internet, once the connection is made, a small icon appears in the tray, along with a balloon giving details on my connection speed. A MessageBox() here would be inexcusable, but a balloon is small, unobtrusive, and does not require any action on my part. After a few seconds, it quietly fades away. Windows XP provides this feature for many more tray icons, from system updates to the activation reminder, adding another feature to them in the form of a close button that will dismiss the balloon instantly, in case I'm annoyed by it and don't want to wait for it to time out. (Windows XP also uses similar balloons in other situations, but that fits more in line with the general XP aping of MacOS...)

Note that balloons as described above are not ToolTips. ToolTips, also in use by tray icons by the way, serve well in their current form: small unobtrusive pieces of text that show up when you hover the mouse over a control, and disappear immediately upon moving the mouse away. Anyone who has used BalloonHelp on the MacOS (Ref: http://developer.apple.com/techpubs/mac/HIGuidelines/HIGuidelines-240.html) should know the advantages Microsoft's ToolTips have when used for this purpose.

With Internet Explorer 5 and later, Microsoft make the Balloon ToolTip style available for general use (via the TTS_BALLOON style). But it is not very simple to use, and of course not useable at all on systems without IE5.

So get to the point already...

The point of all this of course is that I've written an easy to use balloon control. I stress easy to use: in order to convince myself and others to go this way, I wanted it to be as easy to pop up a help balloon as popping up a MessageBox().

Using CBalloonHelp

Add BalloonHelp.cpp and BalloonHelp.h in your project.

API

The important stuff

The easiest way to create a balloon is to use the LaunchBalloon() static function:

void CBalloonHelp::LaunchBalloon(const CString& strTitle, 
                                 const CString& strContent, 
      const CPoint& ptAnchor, 
      LPCTSTR szIcon /*= IDI_EXCLAMATION*/
      unsigned int unOptions /*= unSHOW_CLOSE_BUTTON*/,
      CWnd* pParentWnd /*= NULL*/,
      const CString strURL /*= ""*/,
      unsigned int unTimeout /*= 10000*/)

This will allocate a new CBalloonHelp object, create the window, and show it. When the window closes, the CBalloonHelp object will be deleted automatically. Parameters are as follows:

strTitle    //  Title of balloon

strContent  //  Content of balloon

ptAnchor    //  point tail of balloon  will  be "anchor"ed to.
            //  This is  in client coordinates if pParentWnd is given, 
            //  otherwise it is in screen coordinates.

szIcon      //  One of:
            //    IDI_APPLICATION
            //    IDI_INFORMATION IDI_ASTERISK (same)
            //    IDI_ERROR IDI_HAND (same)
            //    IDI_EXCLAMATION IDI_WARNING (same)
            //    IDI_QUESTION
            //    IDI_WINLOGO

unOptions   /*  One or more of: 
     unCLOSE_ON_LBUTTON_DOWN |  closes window on WM_LBUTTON_DOWN
     unCLOSE_ON_MBUTTON_DOWN |  closes window on WM_MBUTTON_DOWN
     unCLOSE_ON_RBUTTON_DOWN |  closes window on WM_RBUTTON_DOWN
     unCLOSE_ON_LBUTTON_UP   |  closes window on WM_LBUTTON_UP
     unCLOSE_ON_MBUTTON_UP   |  closes window on WM_MBUTTON_UP
     unCLOSE_ON_RBUTTON_UP   |  closes window on WM_RBUTTON_UP
     unCLOSE_ON_MOUSE_MOVE   |  closes window when user moves mouse 
                             |    past threshhold
     unCLOSE_ON_KEYPRESS     |  closes window on the next keypress message 
                                 sent to this thread.
     unCLOSE_ON_ANYTHING     |  all of the above.
     unDELAY_CLOSE           |  when a user action triggers the close, 
                             |   begins timer.  closes when timer expires.
     unSHOW_CLOSE_BUTTON     |  shows close button in upper right
     unSHOW_INNER_SHADOW     |  draw inner shadow in balloon
     unSHOW_TOPMOST          |  place balloon above all other windows
     unDISABLE_XP_SHADOW     |  disable Windows XP's drop-shadow effect 
                             |   (overrides system and user settings)
     unDISABLE_FADE          |  disable the fade-in/fade-out effects 
                             |   (overrides system and user settings)
     unDISABLE_FADEIN        |  disable the fade-in effect
     unDISABLE_FADEOUT       |  disable the fade-out effect
*/

pParentWnd  //  Parent window/anchor window.  If NULL, balloon will be 
            //  anchored in screen coordinates, and owned by the 
            //  application's main window.
strURL      //  If not empty, when the balloon is clicked ShellExecute() 
            //  will be called, with strURL passed in.
unTimeout   //  If not 0, balloon will automatically close after unTimeout 
            //  milliseconds.

Use:

CBalloonHelp::LaunchBalloon("BoogaBooga", 
     "What the hell is \"Booga Booga\" supposed to mean, anyway?", 
     CPoint(0,0));

CBalloonHelp::LaunchBalloon("You are holding down the right mouse button!", 
     "Blah", Cpoint(0,0), IDI_WARNING, 
      CballoonHelp::unCLOSE_ON_RBUTTON_UP|CBalloonHelp::unSHOW_INNER_SHADOW, 
                                          this, "", 0);

The first line above will show a balloon with the title “BoogaBooga” and associated message anchored to the top left corner of the screen (point is in screen coordinates). Ideally, you'd anchor it to something more meaningful, such as the center of a control, or a status bar icon. The default options will cause this balloon to disappear after 10 seconds, and to show the standard information icon at top left, and a close button at top right.

The second line above will show a balloon, this time anchored to the top left corner of the window represented by this, this time with the standard warning icon. The CBalloonHelp::unCLOSE_ON_RBUTTON_UP option will cause it to be destroyed when the right mouse button is released – if a mouse button is being held down, then mouse input is captured, so the balloon will close whenever the right mouse button is released. If no mouse button is held down, the user will have to release the right mouse button somewhere in a window owned by the same thread in order for it to close. The CballoonHelp::unSHOW_INNER_SHADOW option will cause the balloon to be drawn with an inner hilight and shadow... Not all that interesting, but if you're not running on Windows XP, it's the only shadow you can get.

It is also possible to create a balloon using the Create function, in which case you can opt not to have the object automatically deleted when the window closes (the LaunchBalloon function always adds the option CBalloonHelp::unDELETE_THIS_ON_CLOSE to force this, but it may not be desirable if, for instance, you allocate a CBalloonHelp object from the stack). This function gives much greater potential for customization as well (see below for more info).

Complete API

<a name="API Create"></a>BOOL CBalloonHelp::Create(const CString& strTitle, 
               const CString& strContent, 
               const CPoint& ptAnchor, unsigned int unOptions,
               CWnd* pParentWnd /*=NULL*/,
               const CString strURL /*= ""*/,
               unsigned int unTimeout /*= 0*/,
               HICON hIcon /*= NULL*/);
      

This will create and display a balloon window. Title and content override any set for the object prior to this call. ptAnchor indicates anchor location in screen coordinates. unOptions should be a combination of one or more of the following:

CBalloonHelp::unCLOSE_ON_LBUTTON_DOWN //  closes window on WM_LBUTTON_DOWN
CBalloonHelp::unCLOSE_ON_MBUTTON_DOWN //  closes window on WM_MBUTTON_DOWN
CBalloonHelp::unCLOSE_ON_RBUTTON_DOWN //  closes window on WM_RBUTTON_DOWN
CBalloonHelp::unCLOSE_ON_LBUTTON_UP   //  closes window on WM_LBUTTON_UP
CBalloonHelp::unCLOSE_ON_MBUTTON_UP   //  closes window on WM_MBUTTON_UP
CBalloonHelp::unCLOSE_ON_RBUTTON_UP   //  closes window on WM_RBUTTON_UP
CBalloonHelp::unCLOSE_ON_RBUTTON_UP   //  closes window on WM_RBUTTON_UP
CBalloonHelp::unCLOSE_ON_MOUSE_MOVE   //  closes window when user moves mouse past 
                                      //  threshhold
CBalloonHelp::unCLOSE_ON_KEYPRESS     //  closes window on the next keypress message sent
                                      //  to this thread.
CBalloonHelp::unCLOSE_ON_ANYTHING;    //  all of the above
CBalloonHelp::unDELAY_CLOSE;          //  when a user action triggers the close, 
                                      //  begins timer.  closes when timer expires.
CBalloonHelp::unDELETE_THIS_ON_CLOSE  //  deletes object when window is closed.  Used by 
                                      //  LaunchBalloon(), use with care
CBalloonHelp::unSHOW_CLOSE_BUTTON     //  shows close button in upper right
CBalloonHelp::unSHOW_INNER_SHADOW     //  draw inner shadow in balloon
CBalloonHelp::unSHOW_TOPMOST          //  place balloon above all other windows
CBalloonHelp::unDISABLE_XP_SHADOW;    //  disable Windows XP's drop-shadow effect 
                                      //  (overrides system and user settings)
CBalloonHelp::unDISABLE_FADE          //  disable the fade-in/fade-out effects 
                                      //  (overrides system and user settings)
CBalloonHelp::unDISABLE_FADEIN        //  disable the fade-in effect
CBalloonHelp::unDISABLE_FADEOUT       //  disable the fade-out effect
      

If pParentWnd is NULL, the balloon will be anchored in screen coordinates, and owned by the application's main window (AfxGetMainWnd()). If there is no main window, and pParentWnd is NULL, creation will fail. strURL if not empty will be passed to ShellExecute() when the balloon is clicked. If not 0, unTimeout specifies the time in milliseconds until the balloon closes automatically. And hIcon if not NULL specifies the icon shown in the upper left corner of the balloon; it is copied on creation, so the icon can safely be destroyed after Create() returns.

<a name="API SetAnchorPoint"></a>void CBalloonHelp::SetAnchorPoint(CPoint ptAnchor, CWnd* pWndAnchor = NULL);      

Sets the point to which the balloon is anchored (the point the balloon's tail attaches to). Calling this before the balloon is created has no effect, since the anchor is a required parameter of Create(). If pWndAnchor is NULL, ptAnchor is assumed to be in screen coordinates, otherwise it is assumed to be relative to the client area of pWndAnchor

<a name="API SetBackgroundColor"></a>void CBalloonHelp::SetBackgroundColor(COLORREF crBackground);

Sets the background color of the balloon. Can be called before or after the balloon is created.

<a name="API SetForegroundColor"></a>void CBalloonHelp::SetForegroundColor(COLORREF crForeground);

Sets the foreground (borders & text) color of the balloon. Can be called before or after the balloon is created.

<a name="API SetTitle"></a>void CBalloonHelp::SetTitle(const CString& strTitle);

Sets the title of the balloon. Can be called before or after the balloon is created.

<a name="API SetContent"></a>void CBalloonHelp::SetContent(const CString& strContent);

Sets the content of the balloon. Can be called before or after the balloon is created.

<a name="API SetTitleFont"></a>void CBalloonHelp::SetTitleFont(CFont* pFont);

Sets the font used to draw the title of the balloon. Can be called before or after the balloon is created. The font and the CFont object are stored and eventually deleted by the balloon; do not use either after calling this function.

<a name="API SetContentFont"></a>void CBalloonHelp::SetContentFont(CFont* pFont);    

Sets the font used to draw the contents of the balloon. Can be called before or after the balloon is created. If this is called before creation, and the title font is not explicitly set (via SetTitleFont()) then a bold version of this font is used for the title (even if this font is already bold). The font and the CFont object are stored and eventually deleted by the balloon; do not use either after calling this function.

<a name="API SetURL"></a>void CBalloonHelp::SetURL(const CString& strURL);    

Sets the URL or file to be opened by the balloon when clicked. Set to "" to disable. Can be called before or after the balloon is created.

<a name="API SetIcon"></a>void CBalloonHelp::SetIcon(HICON hIcon);    

Sets the icon shown at the top left of the balloon. Pass in NULL to show no icon. Icon will not be scaled. Can be called before or after the balloon is created.

void CBalloonHelp::SetIcon(HBITMAP hBitmap, COLORREF crMask);
      

Sets the icon shown at the top left of the balloon. crMask indicates transparent color. Pass in NULL for hBitmap to show no icon. Icon will not be scaled. Can be called before or after the balloon is created.

void CBalloonHelp::SetIcon(HBITMAP hBitmap, HBITMAP hMask);

Sets the icon shown at the top left of the balloon. hMask indicates the transparent areas. Both parameters must be valid. Icon will not be scaled. Can be called before or after the balloon is created.

void CBalloonHelp::SetIcon(CImageList* pImageList, int nIconIndex);

Sets the icon shown at the top left of the balloon. nIconIndex indicates image to use. Both parameters must be valid. Icon will not be scaled. Can be called before or after the balloon is created.

<a name="API LaunchBalloon"></a>void CBalloonHelp::LaunchBalloon(const CString& strTitle, 
               const CString& strContent, 
               const CPoint& ptAnchor, 
               LPCTSTR szIcon /*= IDI_EXCLAMATION*/,
               unsigned int unOptions /*= unSHOW_CLOSE_BUTTON*/,
               CWnd* pParentWnd /*= NULL*/,
               const CString strURL /*= ""*/,
               unsigned int unTimeout /*= 10000*/)

Creates and shows a balloon. This is a static function, so calling this on an instance of CBalloonHelp is not too useful. If you need more control, create a derived class, or use Create() and associated property functions. See Use for more information.

Features

  • Easy to use interface.
  • Adjusts position depending on anchor position; window will always be completely visible, assuming content size is less than screen size.
  • Uses translucency effects if available.
  • Uses drop-shadow effect if available.

Compatibility

Tested on Windows XP, 2000, 98, and 95

Compiles with VC++ 6.0 / MFC 6 and VC++.NET / MFC 7

Internals

CBalloonHelp is an MFC class, derived from CWnd. The first time a balloon is created, a window class named “BalloonHelpClass” is registered. First, a window class with the CS_DROPSHADOW style is registered; if registration fails, the style is removed, and registration is attempted again. This allows use of the style on Windows XP, while avoiding problems on previous versions of Windows.

The window is created hidden, and then the size of the content and title are calculated. Margins and space for the tail are added to this, and the window is sized and positioned relative to the anchor point. Finally, the window region is set and the window is shown.

Tip: when doing shaped windows, put the shaped bits in the non-client area; it's a lot easier to deal with if you don't have to account for that stuff when dealing with drawing the client area.

AnimateWindow() is used for the fade-in/fade-out effects if available and requested.

Messsage hooks are used to determine when closing mouse actions occur.

Andrew Nosenko's CAuxThunk implementation (renamed to _ThunkImpl) is used for implementing message hooks.

Updates

8/2/02

  • Fixed bug in demo where div by zero balloon would be shown at wrong position.
  • Fixed bug where deallocated memory was accessed when using the strURL parameter to open a file or location when the balloon was clicked.
  • Added option: CBalloonHelp::unDELAY_CLOSE.
  • Added option: CBalloonHelp::unDISABLE_XP_SHADOW.

5/30/02

  • Posted Maximilian Hänel's WTL port.
  • Release #2 (arbitrary number, but needed something)
  • Added support for multiple monitors
  • Added support for closing on WM_*BUTTON_DOWN messages.
  • Added support for anchoring to windows (move with parent).
  • Reworked message hook code, taken mostly from Max's WTL port.

1/23/02

  • Posted Fil Mackay's ATL port

12/31/01

  • Changed utilization of transparency (again), hopefully this will workaround problems with Win2k
  • Altered border calculation code slightly
  • Fixed bug where no title would cause balloon to be full screen sized.

12/21/01

  • Expanded API to allow greater customization
  • Added example of balloon created manually that moves with parent window
  • Implemented keyboard hooks to allow close-on-keypress
  • Separate flags to disable fade-in/fade-out
  • Smooth scaling of small icons used for LauchBalloon() (on Win2k/XP only)
  • Misc. code cleanup.

12/12/01

  • Fixed bug with mouse not being released until fade-out had completed.
  • Added option for disabling fade effects; this is forced if the user has disabled them via the control panel.
  • Added option for making balloons topmost windows.

Related Articles

TODO

Clean up code a bit... most of it is pretty straight forward, but documentation could be better.

Move to straight Win32, not MFC derived class.

Add better code walkthrough to this article.

Thanks...

...Jan van den Baard for showing me the right way to use AnimateWindow(), and for demonstrating how WM_NCHITTEST can be used to provide hot tracking. Check out his ClassLib library on CP!

...Maximilian Hänel for his WTL port, and for demonstrating therein a nicer way to handle message hooks.

...To all the people who've provided feedback, positive and negative. It all helps.

...To Mustafa Demirhan, for his suggestion and information on using keyboard hooks.

...To The Code Project, for providing a useable forum for all of us.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Shog9
Software Developer
United States United States
Poke...

Comments and Discussions

 
BugFlicker free with fade flag. Pinmemberdchris_med7-Mar-12 21:42 
QuestionRight to Left Pinmembertomajabvs31-Aug-11 23:25 
GeneralVS 2010 PinmemberSteve Wisnieski23-Mar-11 5:09 
GeneralRe: VS 2010 Pinmemberliyuncheng25-Mar-11 17:35 
GeneralRuntime error 2 Stack corruption - Warning about this class Pinmembernamezero1111118-Aug-10 15:48 
GeneralRe: Runtime error 2 Stack corruption - Warning about this class Pinmembershoek11-Oct-10 10:15 
AnswerCrash c0000005 on CBalloonHelp::Create() PinmemberVasiliy Zverev23-Mar-10 3:13 
GeneralRe: Crash c0000005 on CBalloonHelp::Create() PinmemberNaryoril30-Jun-10 0:37 
GeneralRe: Crash c0000005 on CBalloonHelp::Create() PinmemberETA8-Oct-10 0:01 
GeneralGetting crashed in IE8 PinmemberDec123430-Jun-09 1:14 
QuestionHow to integrate with C#? PinmemberMember 409275318-Jan-09 20:17 
AnswerRe: How to integrate with C#? PinsitebuilderShog926-Jan-09 7:30 
QuestionDo not use the second screen PinmemberNacereddine31-Mar-08 0:10 
GeneralRe: Do not use the second screen PinsitebuilderShog931-Mar-08 4:54 
QuestionCan we specify the side for the AnchorPoint? Pinmemberjlundberg19-Sep-07 6:26 
GeneralResource leak Pinmemberbryan_f18-Sep-07 9:29 
GeneralRe: Resource leak PinsitebuilderShog911-Oct-07 17:43 
GeneralClosing Pinmemberjlundberg17-Sep-07 3:24 
GeneralWindow activation / fix PinmemberJoergen Sigvardsson13-Sep-07 1:19 
GeneralBugfix PinmemberJoergen Sigvardsson12-Sep-07 23:39 
GeneralRe: Bugfix PinsitebuilderShog913-Sep-07 4:43 
Questionother Icons PinmemberTieter11-Sep-07 0:59 
GeneralGreat, Thanks, and a couple of wrapers PinmemberDan Bloomquist10-Sep-07 13:55 
GeneralUnable to pop up balloon from tray icon - pls help Pinmemberanuradhabhakta28-Aug-07 7:38 
GeneralA fixed version PinmemberDaniel Cohen Gindi16-Aug-07 0:14 
GeneralRe: A fixed version PinmemberRusty at Aquaveo12-May-09 7:15 
GeneralOnce again PinmemberJoergen Sigvardsson14-Aug-07 22:49 
Generalsome problem under vs2005 Pinmemberroni_guan27-Apr-07 23:54 
QuestionHow To Destroy The ToolTip Explicitly Pinmemberrupesh1124-Apr-07 2:59 
AnswerRe: How To Destroy The ToolTip Explicitly PinsitebuilderShog924-Apr-07 5:39 
QuestionI am Geetting Error.... Pinmemberrupesh1120-Apr-07 19:27 
AnswerRe: I am Geetting Error.... PinsitebuilderShog921-Apr-07 6:47 
QuestionHow Would I Use this class in MDI Application Of MFC Pinmemberrupesh1120-Apr-07 18:32 
AnswerRe: How Would I Use this class in MDI Application Of MFC PinsitebuilderShog920-Apr-07 19:10 
QuestionUnhandled exception at 0x782ab573 (mfc80d.dll) PinmemberC043-Mar-07 1:35 
QuestionRe: Unhandled exception at 0x782ab573 (mfc80d.dll) PinsitebuilderShog94-Mar-07 10:44 
QuestionAccess Violations in MFC 8 PinmemberMike Pulice1-Mar-07 8:27 
AnswerRe: Access Violations in MFC 8 PinsitebuilderShog91-Mar-07 8:55 
GeneralRe: Access Violations in MFC 8 PinmemberMike Pulice2-Mar-07 3:35 
GeneralCompiling on x64 PinmemberHugo GC12-Feb-07 23:47 
GeneralRe: Compiling on x64 PinmemberHugo GC14-Feb-07 4:11 
I tried to patch the code with the instructions at:
 
Re: Fails under Windows 2003 SP1 - How to fix the DEP Problem
http://www.codeproject.com/miscctrl/balloonhelp.asp?msg=1383510#xx1383510xx[^]
http://www.codeproject.com/miscctrl/balloonhelp.asp?msg=1462896#xx1462896xx[^]
http://www.codeproject.com/miscctrl/balloonhelp.asp?msg=1531900#xx1531900xx[^]
 
After the three fixes I got rid of _ThunkImpl class and it works on x64!!!.
If anyone wants to get the full code with all the fixes, here it is:
 

BalloonHelp.h :
#ifndef _BALLOON_HELP_H_INCLUDED_
#define _BALLOON_HELP_H_INCLUDED_
 
#include <string>
#include <list>
#include <afxmt.h>
 
class CBalloonHelp : public CWnd
{
public:
	CBalloonHelp();
	virtual ~CBalloonHelp();
 
   // options
   static const unsigned int unCLOSE_ON_LBUTTON_UP;   // closes window on WM_LBUTTON_UP
   static const unsigned int unCLOSE_ON_MBUTTON_UP;   // closes window on WM_MBUTTON_UP
   static const unsigned int unCLOSE_ON_RBUTTON_UP;   // closes window on WM_RBUTTON_UP
   static const unsigned int unCLOSE_ON_LBUTTON_DOWN; // closes window on WM_LBUTTON_DOWN
   static const unsigned int unCLOSE_ON_MBUTTON_DOWN; // closes window on WM_MBUTTON_DOWN
   static const unsigned int unCLOSE_ON_RBUTTON_DOWN; // closes window on WM_RBUTTON_DOWN
   static const unsigned int unCLOSE_ON_MOUSE_MOVE;   // closes window when user moves mouse past threshhold
   static const unsigned int unCLOSE_ON_KEYPRESS;     // closes window on the next keypress message sent to this thread.
   static const unsigned int unCLOSE_ON_ANYTHING;     // all of the above
   static const unsigned int unDELAY_CLOSE;           // when a user action triggers the close, begins timer.  closes when timer expires.
   static const unsigned int unDELETE_THIS_ON_CLOSE;  // deletes object when window is closed.  Used by LaunchBalloon(), use with care
   static const unsigned int unSHOW_CLOSE_BUTTON;     // shows close button in upper right
   static const unsigned int unSHOW_INNER_SHADOW;     // draw inner shadow in balloon
   static const unsigned int unSHOW_TOPMOST;          // place balloon above all other windows
   static const unsigned int unDISABLE_XP_SHADOW;     // disable Windows XP's drop-shadow effect (overrides system and user settings)
   static const unsigned int unDISABLE_FADEIN;        // disable the fade-in effect (overrides system and user settings)
   static const unsigned int unDISABLE_FADEOUT;       // disable the fade-out effect (overrides system and user settings)
   static const unsigned int unDISABLE_FADE;          // disable the fade-in/fade-out effects (overrides system and user settings)
 
   BOOL Create(const CString& strTitle,         // title of balloon
               const CString& strContent,       // content of balloon
               const CPoint& ptAnchor,          // anchor (tail position) of balloon
               unsigned int unOptions,          // options (see above)
               CWnd* pParentWnd = NULL,         // parent window (NULL == MFC main window)
               const CString strURL = "",       // URL to open (ShellExecute()) when clicked
               unsigned int unTimeout = 0,      // delay before closing automatically (milliseconds)
               HICON hIcon = NULL);             // icon to display
 
   // Show a help balloon on screen.
   static void LaunchBalloon(const CString& strTitle, const CString& strContent, 
               const CPoint& ptAnchor, 
               LPCTSTR szIcon = IDI_EXCLAMATION,
               unsigned int unOptions = unSHOW_CLOSE_BUTTON,
               CWnd* pParentWnd = NULL, 
               const CString strURL = "",
               unsigned int unTimeout = 10000);
 
   // Sets the font used for drawing the balloon title.  Deleted by balloon, do not use CFont* after passing to this function.
   void SetTitleFont(CFont* pFont);
   // Sets the font used for drawing the balloon content.  Deleted by balloon, do not use CFont* after passing to this function.
   void SetContentFont(CFont* pFont);
   // Sets the icon displayed in the top left of the balloon (pass NULL to hide icon)
   void SetIcon(HICON hIcon);
   // Sets the icon displayed in the top left of the balloon (pass NULL to hide icon)
   void SetIconScaled(HICON hIcon, int cx, int cy);
   // Sets the icon displayed in the top left of the balloon (pass NULL hBitmap to hide icon)
   void SetIcon(HBITMAP hBitmap, COLORREF crMask);
   // Sets the icon displayed in the top left of the balloon
   void SetIcon(HBITMAP hBitmap, HBITMAP hMask);
   // Set icon displayed in the top left of the balloon to image # nIconIndex from pImageList
   void SetIcon(CImageList* pImageList, int nIconIndex);
   // Sets the URL to be opened when balloon is clicked.  Pass "" to disable.
   void SetURL(const CString& strURL);
   // Sets the number of milliseconds the balloon can remain open.  Set to 0 to disable timeout.
   void SetTimeout(unsigned int unTimeout);
   // Sets the distance the mouse must move before the balloon closes when the unCLOSE_ON_MOUSE_MOVE option is set.
   void SetMouseMoveTolerance(int nTolerance);
   // Sets the point to which the balloon is "anchored"
   void SetAnchorPoint(CPoint ptAnchor, CWnd* pWndAnchor = NULL);
   // Sets the title of the balloon
   void SetTitle(const CString& strTitle);
   // Sets the content of the balloon (plain text only)
   void SetContent(const CString& strContent);
   // Sets the forground (text and border) color of the balloon
   void SetForegroundColor(COLORREF crForeground);
   // Sets the background color of the balloon
   void SetBackgroundColor(COLORREF crBackground);
protected:
   // layout constants
   static const int nTIP_TAIL;
   static const int nTIP_MARGIN;
 
   // calculate anchor position (adjust for client coordinates if used)
   CPoint GetAnchorPoint();
 
   // determine bounds of screen anchor is on (Multi-Monitor compatibility)
   void GetAnchorScreenBounds(CRect& rect);
 
   // determine section of the screen balloon is on
   enum BALLOON_QUADRANT { BQ_TOPRIGHT, BQ_TOPLEFT, BQ_BOTTOMRIGHT, BQ_BOTTOMLEFT };
   BALLOON_QUADRANT GetBalloonQuadrant();
 
   // Draw the non-client area
   virtual void DrawNonClientArea(CDC* pDC);
   // Draw the client area
   virtual void DrawClientArea(CDC* pDC);
   // Calculate the dimensions and draw the balloon header
   virtual CSize DrawHeader(CDC* pDC, bool bDraw = TRUE);
   // Calculate the dimensions and draw the balloon contents
   virtual CSize DrawContent(CDC* pDC, int nTop, bool bDraw = TRUE);
   // Calculate the dimensions required to draw the balloon header
   CSize CalcHeaderSize(CDC* pDC) { return DrawHeader(pDC, FALSE); }
   // Calculate the dimensions required to draw the balloon content
   CSize CalcContentSize(CDC* pDC) { return DrawContent(pDC, 0, FALSE); }
   // Calculate the total size needed by the balloon window
	CSize CalcWindowSize();
   // Calculate the total size needed by the client area of the balloon window
	CSize CalcClientSize();
   // Size and position the balloon window on the screen.
	void PositionWindow();
 
   // Displays the balloon on the screen, performing fade-in if enabled.
   void ShowBalloon(void);
   // Removes the balloon from the screen, performing the fade-out if enabled
   void HideBalloon(void);
 
   // Returns the class ATOM for a BalloonHelp control.  Registers the class first, if necessary.
   static ATOM GetClassAtom(BOOL bShadowed);
 
   // message handlers
   afx_msg void OnShowWindow(BOOL bShow, UINT nStatus);
   afx_msg LRESULT OnPrint(WPARAM wParam, LPARAM lParam);
   afx_msg LRESULT OnPrintClient(WPARAM wParam, LPARAM lParam);
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	afx_msg void OnPaint();
	afx_msg void OnNcPaint();
	afx_msg void OnLButtonDown(UINT, CPoint point);
	afx_msg void OnLButtonUp(UINT, CPoint point);
	afx_msg void OnNcCalcSize(BOOL bCalcValidRects, NCCALCSIZE_PARAMS FAR* lpncsp);
	afx_msg void OnTimer(UINT_PTR nIDEvent);
   afx_msg void OnMouseMove(UINT, CPoint point);
   afx_msg LRESULT OnNcHitTest(CPoint point);
   afx_msg void OnClose();
   afx_msg void OnDestroy();
   virtual void PostNcDestroy();
 
	DECLARE_MESSAGE_MAP()
private:
   // Keyboard hook
   void SetKeyboardHook();
   void RemoveKeyboardHook();
   // Mouse hook
   void SetMouseHook();
   void RemoveMouseHook();
   // Call Window Return hook
   void SetCallWndRetHook();
   void RemoveCallWndRetHook();
 
protected:
   // Keyboard hook callback
   LRESULT KeyboardHookProc( int code, WPARAM wParam, LPARAM lParam);
   // Mouse hook callback
	LRESULT MouseHookProc(int code, WPARAM wParam, LPARAM lParam);
   // Call Window Return hook callback (automatic following)
	LRESULT CallWndRetProc(int code, WPARAM wParam, LPARAM lParam);
 
private:
 
   // animate window API, if available
   typedef BOOL (WINAPI* FN_ANIMATE_WINDOW)(HWND,DWORD,DWORD);
   FN_ANIMATE_WINDOW m_fnAnimateWindow;
 
   // hook handles, if set
   bool           m_bKeyboardHook;
   bool           m_bMouseHook;
   bool           m_bCallWndRetHook;
 
   unsigned int   m_unOptions;
   unsigned int   m_unTimeout;      // max time to show, in milliseconds
   UINT_PTR       m_unTimerClose;   // ID of kill timer
   CString        m_strContent;     // text to show in content area
   CString        m_strURL;         // url to open, if clicked.
   HWND           m_hwndAnchor;     // window to anchor to (can be NULL for desktop anchor)
   CPoint         m_ptAnchor;       // "anchor" (point of tail)
   CImageList     m_ilIcon;         // icon
 
   CFont*         m_pTitleFont;     // font to use for title
   CFont*         m_pContentFont;   // font to use for content
   
   COLORREF       m_crBackground;   // Background color for balloon   
   COLORREF       m_crForeground;   // Foreground color for balloon
   
   CRect          m_screenRect;     // bounds of screen anchor is on
   CRgn           m_rgnComplete;    // Clipping / Drawing region
   CPoint         m_ptMouseOrig;    // original mouse position; for hiding on mouse move
   UINT           m_uCloseState;    // current state of the close button
   int            m_nMouseMoveToleranceX;  // distance mouse has to move before balloon will close.
   int            m_nMouseMoveToleranceY;  // distance mouse has to move before balloon will close.
 
   // class atoms (shadowed/not shadowed)
   static ATOM    s_ClassAtom;
   static ATOM    s_ClassAtomShadowed;
 
protected:
	//Singleton that broadcast hook events to all classes that currently exist.
	class HookMan
	{
	  public:
		// hook handles, if set
		HHOOK          m_hKeyboardHook;
		HHOOK          m_hMouseHook;
		HHOOK          m_hCallWndRetHook;
		std::list<CBalloonHelp*> m_lstClasses;
		int m_nCountKeyboard;
		int m_nCountMouse;
		int m_nCountCallWnd;
		CCriticalSection m_cs;
 
		HookMan();
		~HookMan();
		void AddClass(CBalloonHelp* pClass);
		void RemoveClass(CBalloonHelp* pClass);
 
		// Keyboard hook
		void SetKeyboardHook();
		void RemoveKeyboardHook();
		// Mouse hook
		void SetMouseHook();
		void RemoveMouseHook();
		// Call Window Return hook
		void SetCallWndRetHook();
		void RemoveCallWndRetHook();
 
		static LRESULT CALLBACK KeyboardHookProcStatic( int code, WPARAM wParam, LPARAM lParam);
		static LRESULT CALLBACK MouseHookProcStatic(int code, WPARAM wParam, LPARAM lParam);
		static LRESULT CALLBACK CallWndRetProcStatic(int code, WPARAM wParam, LPARAM lParam);
	};
	friend class HookMan;
	static HookMan s_hookMan;
 
};
 
#endif // _BALLOON_HELP_H_INCLUDED_
 
BalloonHelp.cpp :
// ******************************************************************************
// BalloonHelp.cpp : implementation file
// Copyright 2001-2002, Joshua Heyer
//  You are free to use this code for whatever you want, provided you
// give credit where credit is due.  (I seem to get a lot of questions
// about that statement...  All i mean is, don't copy huge bits of code
// and then claim you wrote it.  You don't have to put my name in an about
// box or anything.  Though i'm not going to stop you if that's really what
// you want :~) )
//  I'm providing this code in the hope that it is useful to someone, as i have
// gotten much use out of other peoples code over the years.
//  If you see value in it, make some improvements, etc., i would appreciate it 
// if you sent me some feedback.
//
// ******************************************************************************
 
#include "stdafx.h"
#include "BalloonHelp.h"
 
// allow multimonitor-aware code on Win95 systems
// comment out the first line if you have already define it in another file
// comment out both lines if you don't care about Win95
//#define COMPILE_MULTIMON_STUBS
//#include "multimon.h"
 
// debug helpers
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
//
// constants that may not be defined if you don't have the latest SDK
// (but i like to use them anyway)
//
 
#ifndef DFCS_HOT
#define DFCS_HOT 0x1000
#endif
 
#ifndef AW_HIDE
#define AW_HIDE 0x00010000
#define AW_BLEND 0x00080000
#endif
 
#ifndef CS_DROPSHADOW
#define CS_DROPSHADOW   0x00020000
#endif
 
#ifndef SPI_GETDROPSHADOW
#define SPI_GETDROPSHADOW  0x1024
#endif
 
#ifndef SPI_GETTOOLTIPANIMATION
#define SPI_GETTOOLTIPANIMATION 0x1016
#endif
 
#ifndef SPI_GETTOOLTIPFADE
#define SPI_GETTOOLTIPFADE 0x1018
#endif
 
/////////////////////////////////////////////////////////////////////////////
// CBalloonHelp
 
// option constants (bits)
const unsigned int   CBalloonHelp::unCLOSE_ON_LBUTTON_UP    = 0x0001;
const unsigned int   CBalloonHelp::unCLOSE_ON_MBUTTON_UP    = 0x0002;
const unsigned int   CBalloonHelp::unCLOSE_ON_RBUTTON_UP    = 0x0004;
const unsigned int   CBalloonHelp::unCLOSE_ON_LBUTTON_DOWN  = 0x0008;
const unsigned int   CBalloonHelp::unCLOSE_ON_MBUTTON_DOWN  = 0x0010;
const unsigned int   CBalloonHelp::unCLOSE_ON_RBUTTON_DOWN  = 0x0020;
const unsigned int   CBalloonHelp::unCLOSE_ON_MOUSE_MOVE    = 0x0040;
const unsigned int   CBalloonHelp::unCLOSE_ON_KEYPRESS      = 0x0080;
const unsigned int   CBalloonHelp::unCLOSE_ON_ANYTHING      = CBalloonHelp::unCLOSE_ON_MOUSE_MOVE|CBalloonHelp::unCLOSE_ON_RBUTTON_DOWN|CBalloonHelp::unCLOSE_ON_RBUTTON_DOWN|CBalloonHelp::unCLOSE_ON_MBUTTON_DOWN|CBalloonHelp::unCLOSE_ON_LBUTTON_DOWN|CBalloonHelp::unCLOSE_ON_RBUTTON_UP|CBalloonHelp::unCLOSE_ON_MBUTTON_UP|CBalloonHelp::unCLOSE_ON_LBUTTON_UP;
const unsigned int   CBalloonHelp::unDELAY_CLOSE            = 0x0100;
const unsigned int   CBalloonHelp::unDELETE_THIS_ON_CLOSE   = 0x0200;
const unsigned int   CBalloonHelp::unSHOW_CLOSE_BUTTON      = 0x0400;
const unsigned int   CBalloonHelp::unSHOW_INNER_SHADOW      = 0x0800;
const unsigned int   CBalloonHelp::unSHOW_TOPMOST           = 0x1000;
const unsigned int   CBalloonHelp::unDISABLE_XP_SHADOW      = 0x2000;
const unsigned int   CBalloonHelp::unDISABLE_FADEIN         = 0x4000;
const unsigned int   CBalloonHelp::unDISABLE_FADEOUT        = 0x8000;
const unsigned int   CBalloonHelp::unDISABLE_FADE           = CBalloonHelp::unDISABLE_FADEIN|CBalloonHelp::unDISABLE_FADEOUT;
 
// layout constants (should prolly be configurable, but who's really gonna care?)
const int            CBalloonHelp::nTIP_TAIL             = 20;
const int            CBalloonHelp::nTIP_MARGIN           = 8;
// class atom (why don't i do this the MFC way?  Drop shadows!)
ATOM                 CBalloonHelp::s_ClassAtom           = NULL;
ATOM                 CBalloonHelp::s_ClassAtomShadowed   = NULL;
 
// Kill timer
#define ID_TIMER_CLOSE  1
 

//
// The launchers
//
 

//
// Show a help balloon on screen
// Parameters:
//    strTitle    |  Title of balloon
//    unTitle     |  Title of balloon (id of string resource)
//    strContent  |  Content of balloon
//    unContent   |  Content of balloon (id of string resource)
//    ptAnchor    |  point tail of balloon will be "anchor"ed to
//    szIcon      |  One of:
//                   IDI_APPLICATION
//                   IDI_INFORMATION IDI_ASTERISK (same)
//                   IDI_ERROR IDI_HAND (same)
//                   IDI_EXCLAMATION IDI_WARNING (same)
//                   IDI_QUESTION
//                   IDI_WINLOGO
//                   NULL (no icon)
//    unIconID    |  ID of icon to display (loaded from resources)
//    unOptions   |  One or more of:
//                :     unCLOSE_ON_LBUTTON_UP   |  closes window on WM_LBUTTON_UP
//                :     unCLOSE_ON_MBUTTON_UP   |  closes window on WM_MBUTTON_UP
//                :     unCLOSE_ON_RBUTTON_UP   |  closes window on WM_RBUTTON_UP
//                :     unCLOSE_ON_LBUTTON_DOWN |  closes window on WM_LBUTTON_DOWN
//                :     unCLOSE_ON_MBUTTON_DOWN |  closes window on WM_MBUTTON_DOWN
//                :     unCLOSE_ON_RBUTTON_DOWN |  closes window on WM_RBUTTON_DOWN
//                :     unCLOSE_ON_MOUSE_MOVE   |  closes window when user moves mouse past threshhold
//                :     unCLOSE_ON_KEYPRESS     |  closes window on the next keypress message sent to this thread.
//                :     unCLOSE_ON_ANYTHING     |  all of the above.
//                :     unDELAY_CLOSE           |  when a user action triggers the close, begins timer.  closes when timer expires.
//                :     unSHOW_CLOSE_BUTTON     |  shows close button in upper right
//                :     unSHOW_INNER_SHADOW     |  draw inner shadow in balloon
//                :     unSHOW_TOPMOST          |  place balloon above all other windows
//                :     unDISABLE_XP_SHADOW     |  disable Windows XP's drop-shadow effect (overrides system and user settings)
//                :     unDISABLE_FADE          |  disable the fade-in/fade-out effects (overrides system and user settings)
//                :     unDISABLE_FADEIN        |  disable the fade-in effect
//                :     unDISABLE_FADEOUT       |  disable the fade-out effect
//    pParentWnd  |  Parent window.  If NULL will be set to AfxGetMainWnd(), and anchor to screen
//    strURL      |  If not empty, when the balloon is clicked ShellExecute() will
//                |  be called, with strURL passed in.
//    unTimeout   |  If not 0, balloon will automatically close after unTimeout milliseconds.
//
void CBalloonHelp::LaunchBalloon(const CString& strTitle, const CString& strContent, 
               const CPoint& ptAnchor, 
               LPCTSTR szIcon /*= IDI_EXCLAMATION*/,
               unsigned int unOptions /*= unSHOW_CLOSE_BUTTON*/,
               CWnd* pParentWnd /*= NULL*/,
               const CString strURL /*= ""*/,
               unsigned int unTimeout /*= 10000*/)
{
   CBalloonHelp* pbh = new CBalloonHelp;
   if ( NULL != szIcon )
   {
      // Note: Since i'm scaling the icon anyway, i'll allow it to become larger
      // than the standard small icon if the close button is.
      CSize sizeIcon(max(::GetSystemMetrics(SM_CXSIZE), ::GetSystemMetrics(SM_CXSMICON)), max(::GetSystemMetrics(SM_CYSIZE), ::GetSystemMetrics(SM_CYSMICON)));
      HICON hIcon = (HICON)::LoadImage(NULL, szIcon, IMAGE_ICON, sizeIcon.cx, sizeIcon.cy, LR_SHARED);
      if (NULL != hIcon)
         pbh->SetIconScaled(hIcon, sizeIcon.cx, sizeIcon.cy);
   }
 
   pbh->Create(strTitle, strContent, ptAnchor, unOptions|unDELETE_THIS_ON_CLOSE, 
               pParentWnd, strURL, unTimeout, NULL);
}
 

//
//  The class
//
 
CBalloonHelp::CBalloonHelp()
:  m_fnAnimateWindow(NULL),
   m_unOptions(0),
   m_unTimeout(0),
   m_unTimerClose(0),
   m_strURL(""),
   m_ptAnchor(0,0),
   m_hwndAnchor(NULL),
   m_screenRect(0,0,0,0),
   m_strContent(""),
   m_nMouseMoveToleranceX(34),     // later retrieved from system
   m_nMouseMoveToleranceY(14),     // later retrieved from system
   m_ptMouseOrig(0,0),
   m_uCloseState(0),
   m_pTitleFont(NULL),
   m_pContentFont(NULL),
   m_crForeground(::GetSysColor(COLOR_INFOTEXT)),
   m_crBackground(::GetSysColor(COLOR_INFOBK)),
   m_bKeyboardHook(false),
   m_bMouseHook(false),
   m_bCallWndRetHook(false)
{
   // hook manager must know about us.
   CBalloonHelp::s_hookMan.AddClass(this);
 
   // retrieve window animation API if available
   HMODULE hUser32 = GetModuleHandle(_T("USER32.DLL"));
   // can't imagine why that would fail, but might as well *look* safe...  ;~)
   if ( NULL != hUser32 )
      m_fnAnimateWindow = (FN_ANIMATE_WINDOW)GetProcAddress(hUser32, _T("AnimateWindow"));
   else
      m_fnAnimateWindow = NULL;
 
   // get system tolerance values
   int nTol = 0;
   if ( ::SystemParametersInfo(SPI_GETMOUSEHOVERWIDTH, 0, &nTol, 0) && nTol > 0 )
   {
	   m_nMouseMoveToleranceX = nTol+30;
	   m_nMouseMoveToleranceY = nTol+10;
   }
}
 
CBalloonHelp::~CBalloonHelp()
{
   // hook manager should no longer send us events.
   CBalloonHelp::s_hookMan.RemoveClass(this);
 
   if ( NULL != m_pTitleFont )
      delete m_pTitleFont;
   m_pTitleFont = NULL;
   if ( NULL != m_pContentFont )
      delete m_pContentFont;
   m_pContentFont = NULL;
}
 

// Sets the font used for drawing the balloon title.  Deleted by balloon, do not use CFont* after passing to this function.
void CBalloonHelp::SetTitleFont(CFont* pFont)
{
   if ( NULL != m_pTitleFont )
      delete m_pTitleFont;
   m_pTitleFont = pFont;
   // if already visible, resize & move
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the font used for drawing the balloon content.  Deleted by balloon, do not use CFont* after passing to this function.
void CBalloonHelp::SetContentFont(CFont* pFont)
{
   if ( NULL != m_pContentFont )
      delete m_pContentFont;
   m_pContentFont = pFont;
   // if already visible, resize & move
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the icon displayed in the top left of the balloon (pass NULL to hide icon)
void CBalloonHelp::SetIcon(HICON hIcon)
{
   if ( NULL != m_ilIcon.m_hImageList )
      m_ilIcon.DeleteImageList();
   ICONINFO iconinfo;
   if ( NULL != hIcon && ::GetIconInfo(hIcon, &iconinfo) )
   {
      SetIcon(iconinfo.hbmColor, iconinfo.hbmMask);
      ::DeleteObject(iconinfo.hbmColor);
      ::DeleteObject(iconinfo.hbmMask);
   }
   // if already visible, resize & move (icon size may have changed)
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the icon displayed in the top left of the balloon (pass NULL to hide icon)
void CBalloonHelp::SetIconScaled(HICON hIcon, int cx, int cy)
{
   // i now have two device contexts and two bitmaps.
   // i will select a bitmap in each device context,
   // draw the icon into the first one,
   // scale it into the second one,
   // and set the second one as the balloon icon.
   // This is a rather long process to get a scaled icon,
   // but ensures maximum compatibility between different
   // versions of Windows, while producing the best possible
   // results on each version (quite good in WinNT and better, sorta ok in Win9x).
   ICONINFO iconinfo;
   if ( NULL != hIcon && ::GetIconInfo(hIcon, &iconinfo) )
   {
      BITMAP bm;
      if (::GetObject(iconinfo.hbmColor, sizeof(bm),(LPVOID)&bm))
      {
         CDC dc;
         CDC dcTmp1;
         CDC dcTmp2;
         CBitmap bmpIcon;
         CBitmap bmpIconScaled;
         dc.Attach(::GetDC(NULL));
         dcTmp1.CreateCompatibleDC(&dc);
         dcTmp2.CreateCompatibleDC(&dc);
         bmpIcon.CreateCompatibleBitmap(&dc, bm.bmWidth, bm.bmHeight);
         bmpIconScaled.CreateCompatibleBitmap(&dc, cx, cy);
         ::ReleaseDC(NULL, dc.Detach());
 
         CBitmap* pbmpOld1 = dcTmp1.SelectObject(&bmpIcon);
         CBitmap* pbmpOld2 = dcTmp2.SelectObject(&bmpIconScaled);
         dcTmp1.FillSolidRect(0,0,bm.bmWidth,bm.bmHeight, m_crBackground);
         ::DrawIconEx(dcTmp1, 0,0,hIcon,bm.bmWidth,bm.bmHeight,0,NULL,DI_NORMAL);
         dcTmp2.SetStretchBltMode(HALFTONE);
         dcTmp2.StretchBlt(0,0,cx,cy,&dcTmp1, 0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
         dcTmp1.SelectObject(pbmpOld1);
         dcTmp2.SelectObject(pbmpOld2);
 
         SetIcon(bmpIconScaled, m_crBackground);
      }
      ::DeleteObject(iconinfo.hbmColor);
      ::DeleteObject(iconinfo.hbmMask);
   }
}
 
// Sets the icon displayed in the top left of the balloon (pass NULL hBitmap to hide icon)
void CBalloonHelp::SetIcon(HBITMAP hBitmap, COLORREF crMask)
{
   if ( NULL != m_ilIcon.m_hImageList )
      m_ilIcon.DeleteImageList();
 
   if ( NULL != hBitmap )
   {
      BITMAP bm;
      if (::GetObject(hBitmap, sizeof(bm),(LPVOID)&bm))
      {
         m_ilIcon.Create(bm.bmWidth, bm.bmHeight, ILC_COLOR24|ILC_MASK,1,0);
         m_ilIcon.Add(CBitmap::FromHandle(hBitmap), crMask);
      }
   }
   // if already visible, resize & move (icon size may have changed)
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the icon displayed in the top left of the balloon
void CBalloonHelp::SetIcon(HBITMAP hBitmap, HBITMAP hMask)
{
   if ( NULL != m_ilIcon.m_hImageList )
      m_ilIcon.DeleteImageList();
 
   ASSERT(NULL != hBitmap);
   ASSERT(NULL != hMask);
 
   BITMAP bm;
   if (::GetObject(hBitmap, sizeof(bm),(LPVOID)&bm))
   {
      m_ilIcon.Create(bm.bmWidth, bm.bmHeight, ILC_COLOR24|ILC_MASK,1,0);
      m_ilIcon.Add(CBitmap::FromHandle(hBitmap), CBitmap::FromHandle(hMask));
   }
   // if already visible, resize & move (icon size may have changed)
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Set icon displayed in the top left of the balloon to image # nIconIndex from pImageList
void CBalloonHelp::SetIcon(CImageList* pImageList, int nIconIndex)
{
   // sanity checks
   ASSERT_VALID(pImageList);
   ASSERT(nIconIndex >= 0 && nIconIndex < pImageList->GetImageCount() );
 
   HICON hIcon = NULL;
   if ( NULL != pImageList && nIconIndex >= 0 && nIconIndex < pImageList->GetImageCount() )
      hIcon = pImageList->ExtractIcon(nIconIndex);
   SetIcon(hIcon);
   if ( NULL != hIcon )
      ::DestroyIcon(hIcon);
   // if already visible, resize & move (icon size may have changed)
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the URL to be opened when balloon is clicked.  Pass "" to disable.
void CBalloonHelp::SetURL(const CString& strURL)
{
   m_strURL = strURL;
}
 
// Sets the number of milliseconds the balloon can remain open.  Set to 0 to disable timeout.
void CBalloonHelp::SetTimeout(unsigned int unTimeout)
{
   m_unTimeout = unTimeout;
   // if timer is already set, reset.
   if ( NULL != m_hWnd )
   {
      if ( m_unTimeout > 0 )
      {
         m_unTimerClose = SetTimer(ID_TIMER_CLOSE, m_unTimeout, NULL);
      }
      else
      {
         KillTimer(m_unTimerClose);
      }
   }
}
 
// Sets the point to which the balloon is "anchored"
void CBalloonHelp::SetAnchorPoint(CPoint ptAnchor, CWnd* pWndAnchor /*= NULL*/)
{
   m_ptAnchor = ptAnchor;
   m_hwndAnchor = pWndAnchor->GetSafeHwnd();
 
   // if we're anchored to a window, set hook
   if ( NULL != m_hwndAnchor )
      SetCallWndRetHook();
   else
      RemoveCallWndRetHook();
 
   // if already visible, move
   if ( NULL != m_hWnd )
   {
      // reposition
      PositionWindow();
   }
}
 
// Sets the title of the balloon
void CBalloonHelp::SetTitle(const CString& strTitle)
{
   SetWindowText(strTitle);
   // if already visible, resize & move
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the content of the balloon (plain text only)
void CBalloonHelp::SetContent(const CString& strContent)
{
   m_strContent = strContent;
   // if already visible, resize & move
   if ( NULL != m_hWnd )
      PositionWindow();
}
 
// Sets the forground (text and border) color of the balloon
void CBalloonHelp::SetForegroundColor(COLORREF crForeground)
{
   m_crForeground = crForeground;
   // repaint if visible
   if ( NULL != m_hWnd )
      Invalidate(FALSE);
}
 
// Sets the background color of the balloon
void CBalloonHelp::SetBackgroundColor(COLORREF crBackground)
{
   m_crBackground = crBackground;
   // repaint if visible
   if ( NULL != m_hWnd )
      Invalidate(FALSE);
}
 
// Sets the distance the mouse must move before the balloon closes when the unCLOSE_ON_MOUSE_MOVE option is set.
void CBalloonHelp::SetMouseMoveTolerance(int nTolerance)
{
	m_nMouseMoveToleranceX = nTolerance;
	m_nMouseMoveToleranceY = nTolerance;
}
 
//
// creates a new balloon window
// Parameters:
//    strTitle    |  Title of balloon
//    strContent  |  Content of balloon
//    ptAnchor    |  point tail of balloon will be "anchor"ed to
//    unOptions   |  One or more of:
//                :     unCLOSE_ON_LBUTTON_UP   |  closes window on WM_LBUTTON_UP
//                :     unCLOSE_ON_MBUTTON_UP   |  closes window on WM_MBUTTON_UP
//                :     unCLOSE_ON_RBUTTON_UP   |  closes window on WM_RBUTTON_UP
//                :     unCLOSE_ON_LBUTTON_DOWN |  closes window on WM_LBUTTON_DOWN
//                :     unCLOSE_ON_MBUTTON_DOWN |  closes window on WM_MBUTTON_DOWN
//                :     unCLOSE_ON_RBUTTON_DOWN |  closes window on WM_RBUTTON_DOWN
//                :     unCLOSE_ON_MOUSE_MOVE   |  closes window when user moves mouse past threshhold
//                :     unCLOSE_ON_KEYPRESS     |  closes window on the next keypress message sent to this thread.
//                :     unCLOSE_ON_ANYTHING     |  all of the above.
//                :     unDELAY_CLOSE           |  when a user action triggers the close, begins timer.  closes when timer expires.
//                :     unDELETE_THIS_ON_CLOSE  |  deletes object when window is closed.  Used by LaunchBalloon(), use with care
//                :     unSHOW_CLOSE_BUTTON     |  shows close button in upper right
//                :     unSHOW_INNER_SHADOW     |  draw inner shadow in balloon
//                :     unSHOW_TOPMOST          |  place balloon above all other windows
//                :     unDISABLE_XP_SHADOW     |  disable Windows XP's drop-shadow effect (overrides system and user settings)
//                :     unDISABLE_FADE          |  disable the fade-in/fade-out effects (overrides system and user settings)
//                :     unDISABLE_FADEIN        |  disable the fade-in effect
//                :     unDISABLE_FADEOUT       |  disable the fade-out effect
//    pParentWnd  |  Parent window.  If NULL will be set to AfxGetMainWnd() and anchor to screen
//    strURL      |  If not empty, when the balloon is clicked ShellExecute() will
//                |  be called, with strURL passed in.
//    unTimeout   |  If not 0, balloon will automatically close after unTimeout milliseconds.
//    hIcon       |  If not NULL, the icon indicated by hIcon will be displayed at top-left of the balloon.
//
// Returns:
//    TRUE if successful, else FALSE
//
BOOL CBalloonHelp::Create(const CString& strTitle, const CString& strContent, 
               const CPoint& ptAnchor, unsigned int unOptions,
               CWnd* pParentWnd /*=NULL*/,
               const CString strURL /*= ""*/,
               unsigned int unTimeout /*= 0*/,
               HICON hIcon /*= NULL*/)
{
   m_strContent   = strContent;
   SetAnchorPoint(ptAnchor, pParentWnd);
   m_unOptions    = unOptions;
   m_strURL       = strURL;
   m_unTimeout    = unTimeout;
 
   if ( NULL != hIcon )
      SetIcon(hIcon);
   
   pParentWnd = GetSafeOwner(pParentWnd);
   if ( NULL == pParentWnd )
   {
      // something is wrong; MFC should be able to find a main window.
      ASSERT(FALSE);
      return FALSE;
   }
 
   // if no fonts set, use defaults
   if ( NULL == m_pContentFont )
   {
      m_pContentFont = new CFont;
      if ( !m_pContentFont->CreateStockObject(DEFAULT_GUI_FONT) )
         return FALSE;
   }
 
   // title font defaults to bold version of content font
   if ( NULL == m_pTitleFont )
   {
      m_pTitleFont = new CFont;
      LOGFONT LogFont;
      m_pContentFont->GetLogFont(&LogFont);
      LogFont.lfWeight = FW_BOLD;
      if ( !m_pTitleFont->CreateFontIndirect(&LogFont) )
         return FALSE;
   }
 
   ATOM wndClass = GetClassAtom(!(m_unOptions&unDISABLE_XP_SHADOW));
   if ( NULL == wndClass )  // couldn't register class
      return FALSE;
 
   // check system settings: if fade effects are disabled or unavailable, disable here too
   BOOL bFade = FALSE;
   ::SystemParametersInfo(SPI_GETTOOLTIPANIMATION, 0, &bFade, 0);
   if (bFade)
      ::SystemParametersInfo(SPI_GETTOOLTIPFADE, 0, &bFade, 0);
   if (!bFade || NULL == m_fnAnimateWindow)
      m_unOptions |= unDISABLE_FADE;
 
   // create invisible at arbitrary position; then position, set region, and finally show
 
   // the idea with WS_EX_TOOLWINDOW is, you can't switch to this using alt+tab
   DWORD dwExStyle = WS_EX_TOOLWINDOW;
   if ( m_unOptions&unSHOW_TOPMOST )      // make topmost, if requested
      dwExStyle |= WS_EX_TOPMOST;
   if ( !CreateEx(dwExStyle, (LPCTSTR)wndClass, strTitle, WS_POPUP, CRect(0,0,10,10), pParentWnd, 0, NULL) )
      return FALSE;
   PositionWindow();
 
   if ( (m_unOptions&unCLOSE_ON_MOUSE_MOVE)
      ||(m_unOptions&unCLOSE_ON_LBUTTON_UP)
      ||(m_unOptions&unCLOSE_ON_LBUTTON_DOWN)
      ||(m_unOptions&unCLOSE_ON_MBUTTON_UP)
      ||(m_unOptions&unCLOSE_ON_MBUTTON_DOWN)
      ||(m_unOptions&unCLOSE_ON_RBUTTON_UP)
      ||(m_unOptions&unCLOSE_ON_RBUTTON_DOWN) )
   {
      ::GetCursorPos(&m_ptMouseOrig);
      SetMouseHook();
   }
 
   // these need to take effect even if the window receiving them
   // is not owned by this process.  So, if this process does not
   // already have the mouse captured, capture it!
   if ( (m_unOptions&unCLOSE_ON_LBUTTON_UP)
      ||(m_unOptions&unCLOSE_ON_MBUTTON_UP)
      ||(m_unOptions&unCLOSE_ON_RBUTTON_UP) )
   {
      // no, i don't particularly need or want to deal with a situation
      // where a balloon is being created and another program has captured
      // the mouse.  If you need it, it shouldn't be too hard, just do it here.
      if ( NULL == GetCapture() )
         SetCapture();
   }
 
   if ( m_unOptions&unCLOSE_ON_KEYPRESS )
      SetKeyboardHook();
 
   ShowBalloon();
   return TRUE;
}
 
// calculate anchor position (adjust for client coordinates if used)
CPoint CBalloonHelp::GetAnchorPoint()
{
   CPoint ptAnchor = m_ptAnchor;
   // assume if window was given, point is in client coords
   if ( NULL != m_hwndAnchor )
      ::ClientToScreen(m_hwndAnchor, &ptAnchor);
   return ptAnchor;
}
 
// determine bounds of screen anchor is on (Multi-Monitor compatibility)
void CBalloonHelp::GetAnchorScreenBounds(CRect& rect)
{
   if ( m_screenRect.IsRectEmpty() )
   {     
      // get the nearest monitor to the anchor
      HMONITOR hMonitor = MonitorFromPoint(GetAnchorPoint(), MONITOR_DEFAULTTONEAREST);
 
      // get the monitor bounds
      MONITORINFO mi;
      mi.cbSize = sizeof(mi);
      GetMonitorInfo(hMonitor, &mi);
 
      // work area (area not obscured by task bar, etc.)
      m_screenRect = mi.rcWork;
   }
   rect = m_screenRect;
}
 
// calculates the area of the screen the balloon falls into
// this determins which direction the tail points
CBalloonHelp::BALLOON_QUADRANT CBalloonHelp::GetBalloonQuadrant()
{
   CRect rectDesktop;
   GetAnchorScreenBounds(rectDesktop);
   CPoint ptAnchor = GetAnchorPoint();
   
   if ( ptAnchor.y < rectDesktop.top + rectDesktop.Height()/2 )
   {
      if ( ptAnchor.x < rectDesktop.left + rectDesktop.Width()/2 )
      {
         return BQ_TOPLEFT;
      }
      else
      {
         return BQ_TOPRIGHT;
      }
   }
   else
   {
      if ( ptAnchor.x < rectDesktop.left + rectDesktop.Width()/2 )
      {
         return BQ_BOTTOMLEFT;
      }
      else
      {
         return BQ_BOTTOMRIGHT;
      }
   }
 
   // unreachable
}
 
// Draw the non-client area
void CBalloonHelp::DrawNonClientArea(CDC* pDC)
{
   CRect rect;
   GetWindowRect(&rect);
   ScreenToClient(&rect);
   CRect rectClient;
   GetClientRect(&rectClient);
   rectClient.OffsetRect(-rect.left, -rect.top);
   rect.OffsetRect(-rect.left, -rect.top);
   pDC->ExcludeClipRect(&rectClient);
   pDC->FillSolidRect(&rect, m_crBackground);
   pDC->SelectClipRgn(NULL);
 
   ASSERT(NULL != m_rgnComplete.m_hObject);
   CBrush   brushFg;
   brushFg.CreateSolidBrush(m_crForeground);
   if ( m_unOptions & unSHOW_INNER_SHADOW )
   {
      CBrush   brushHL;
      // slightly lighter color
      int red = 170 + GetRValue(m_crBackground)/3;
      int green = 170 + GetGValue(m_crBackground)/3;
      int blue = 170 + GetBValue(m_crBackground)/3;
      brushHL.CreateSolidBrush(RGB(red,green,blue));
      m_rgnComplete.OffsetRgn(1,1);
      pDC->FrameRgn(&m_rgnComplete, &brushHL, 2, 2);
      // slightly darker color
      red = GetRValue(m_crForeground)/3 + GetRValue(m_crBackground)/3*2;
      green = GetGValue(m_crForeground)/3 + GetGValue(m_crBackground)/3*2;
      blue = GetBValue(m_crForeground)/3 + GetBValue(m_crBackground)/3*2;
      brushHL.DeleteObject();
      m_rgnComplete.OffsetRgn(-2,-2);
      brushHL.CreateSolidBrush(RGB(red,green,blue));
      pDC->FrameRgn(&m_rgnComplete, &brushHL, 2, 2);
      m_rgnComplete.OffsetRgn(1,1);
   }
   // outline
   pDC->FrameRgn(&m_rgnComplete, &brushFg, 1, 1);
}
 
// Draw the client area
void CBalloonHelp::DrawClientArea(CDC* pDC)
{
   CSize sizeHeader = DrawHeader(pDC);
   DrawContent(pDC, sizeHeader.cy+nTIP_MARGIN);
}
 
// Calculate the dimensions and draw the balloon header
CSize CBalloonHelp::DrawHeader(CDC* pDC, bool bDraw)
{
   CSize sizeHdr(0,0);
   CRect rectClient;
   GetClientRect(&rectClient);   // use this for positioning when drawing
                                 // else if content is wider than title, centering wouldn't work

   // calc & draw icon
   if ( NULL != m_ilIcon.m_hImageList )
   {
      int x = 0;
      int y = 0;
      ImageList_GetIconSize(m_ilIcon, &x, &y);
      sizeHdr.cx += x;
      sizeHdr.cy = max(sizeHdr.cy, y);
      m_ilIcon.SetBkColor(m_crBackground);
      if (bDraw)
         m_ilIcon.Draw(pDC, 0, CPoint(0,0), ILD_NORMAL);//ILD_TRANSPARENT);
      rectClient.left += x;
   }
 
   // calc & draw close button
   if ( m_unOptions & unSHOW_CLOSE_BUTTON )
   {
      int nBtnWidth = ::GetSystemMetrics(SM_CXSIZE);
      // if something is already in the header (icon) leave space
      if ( sizeHdr.cx > 0 )
         sizeHdr.cx += nTIP_MARGIN;
      sizeHdr.cx += nBtnWidth;
      sizeHdr.cy = max(sizeHdr.cy, ::GetSystemMetrics(SM_CYSIZE));
      if (bDraw)
         pDC->DrawFrameControl(CRect(rectClient.right-nBtnWidth,0,rectClient.right,::GetSystemMetrics(SM_CYSIZE)), DFC_CAPTION, DFCS_CAPTIONCLOSE|DFCS_FLAT);
      rectClient.right -= nBtnWidth;
   }
 
   // calc title size
   CString strTitle;
   GetWindowText(strTitle);
   if ( !strTitle.IsEmpty() )
   {
      CFont* pOldFont = pDC->SelectObject(m_pTitleFont);
 
      // if something is already in the header (icon or close button) leave space
      if ( sizeHdr.cx > 0 ) 
         sizeHdr.cx += nTIP_MARGIN;
      CRect rectTitle(0,0,0,0);
      pDC->DrawText(strTitle, &rectTitle, DT_CALCRECT | DT_NOPREFIX | DT_EXPANDTABS | DT_SINGLELINE);
      sizeHdr.cx += rectTitle.Width();
      sizeHdr.cy = max(sizeHdr.cy, rectTitle.Height());
 
      // draw title
      if ( bDraw )
      {
         pDC->SetBkMode(TRANSPARENT);
         pDC->SetTextColor(m_crForeground);
         pDC->DrawText(strTitle, &rectClient, DT_CENTER | DT_NOPREFIX  | DT_EXPANDTABS | DT_SINGLELINE);
      }
 
      // cleanup
      pDC->SelectObject(pOldFont);
   }
 
   return sizeHdr;
}
 
// Calculate the dimensions and draw the balloon contents
CSize CBalloonHelp::DrawContent(CDC* pDC, int nTop, bool bDraw)
{
   CRect rectContent;
   GetAnchorScreenBounds(rectContent);
   rectContent.OffsetRect(-rectContent.left, -rectContent.top);
   rectContent.top = nTop;
 
   // limit to half screen width
   rectContent.right -= rectContent.Width()/2;
 
   // calc size
   CFont* pOldFont = pDC->SelectObject(m_pContentFont);
   if ( !m_strContent.IsEmpty() )
      pDC->DrawText(m_strContent, &rectContent, DT_CALCRECT | DT_LEFT | DT_NOPREFIX | DT_EXPANDTABS | DT_WORDBREAK);
   else
      rectContent.SetRectEmpty();   // don't want to leave half the screen for empty strings ;)
   
   // draw
   if (bDraw)
   {
      pDC->SetBkMode(TRANSPARENT);
      pDC->SetTextColor(m_crForeground);
      pDC->DrawText(m_strContent, &rectContent, DT_LEFT | DT_NOPREFIX | DT_WORDBREAK | DT_EXPANDTABS);
   }
 
   // cleanup
   pDC->SelectObject(pOldFont);
 
   return rectContent.Size();
}
 
// calculates the client size necessary based on title and content
CSize CBalloonHelp::CalcClientSize()
{
   ASSERT(NULL != m_hWnd);
   CWindowDC dc(this);
 
   CSize sizeHeader = CalcHeaderSize(&dc);
   CSize sizeContent = CalcContentSize(&dc);
 
   return CSize(max(sizeHeader.cx,sizeContent.cx), sizeHeader.cy + nTIP_MARGIN + sizeContent.cy);
}
 
// calculates the size for the entire window based on content size
CSize CBalloonHelp::CalcWindowSize()
{
   CSize size = CalcClientSize();
   size.cx += nTIP_MARGIN*2;
   size.cy += nTIP_TAIL+nTIP_MARGIN*2;
   //size.cx = max(size.cx, nTIP_MARGIN*2+nTIP_TAIL*4);
   return size;
}
 

// this routine calculates the size and position of the window relative
// to it's anchor point, and moves the window accordingly.  The region is also
// created and set here.
void CBalloonHelp::PositionWindow()
{
   CSize sizeWnd = CalcWindowSize();
 
   CPoint ptTail[3];
   CPoint ptTopLeft(0,0);
   CPoint ptBottomRight(sizeWnd.cx, sizeWnd.cy);
 
   // force recalculation of desktop
   m_screenRect.SetRectEmpty();
 
   switch (GetBalloonQuadrant())
   {
   case BQ_TOPLEFT:
      ptTopLeft.y = nTIP_TAIL;
      ptTail[0].x = (sizeWnd.cx-nTIP_TAIL)/4 + nTIP_TAIL;
      ptTail[0].y = nTIP_TAIL+1;
      ptTail[2].x = (sizeWnd.cx-nTIP_TAIL)/4;
      ptTail[2].y = ptTail[0].y;
      ptTail[1].x = ptTail[2].x;
      ptTail[1].y = 1;
      break;
   case BQ_TOPRIGHT:
      ptTopLeft.y = nTIP_TAIL;
      ptTail[0].x = (sizeWnd.cx-nTIP_TAIL)/4*3;
      ptTail[0].y = nTIP_TAIL+1;
      ptTail[2].x = (sizeWnd.cx-nTIP_TAIL)/4*3 + nTIP_TAIL;
      ptTail[2].y = ptTail[0].y;
      ptTail[1].x = ptTail[2].x;
      ptTail[1].y = 1;
      break;
   case BQ_BOTTOMLEFT:
      ptBottomRight.y = sizeWnd.cy-nTIP_TAIL;
      ptTail[0].x = (sizeWnd.cx-nTIP_TAIL)/4 + nTIP_TAIL;
      ptTail[0].y = sizeWnd.cy-nTIP_TAIL-2;
      ptTail[2].x = (sizeWnd.cx-nTIP_TAIL)/4;
      ptTail[2].y = ptTail[0].y;
      ptTail[1].x = ptTail[2].x;
      ptTail[1].y = sizeWnd.cy-2;
      break;
   case BQ_BOTTOMRIGHT:
      ptBottomRight.y = sizeWnd.cy-nTIP_TAIL;
      ptTail[0].x = (sizeWnd.cx-nTIP_TAIL)/4*3;
      ptTail[0].y = sizeWnd.cy-nTIP_TAIL-2;
      ptTail[2].x = (sizeWnd.cx-nTIP_TAIL)/4*3 + nTIP_TAIL;
      ptTail[2].y = ptTail[0].y;
      ptTail[1].x = ptTail[2].x;
      ptTail[1].y = sizeWnd.cy-2;
      break;
   }
 
   // adjust for very narrow balloons
   if ( ptTail[0].x < nTIP_MARGIN )
      ptTail[0].x = nTIP_MARGIN;
   if ( ptTail[0].x > sizeWnd.cx - nTIP_MARGIN )
      ptTail[0].x = sizeWnd.cx - nTIP_MARGIN;
   if ( ptTail[1].x < nTIP_MARGIN )
      ptTail[1].x = nTIP_MARGIN;
   if ( ptTail[1].x > sizeWnd.cx - nTIP_MARGIN )
      ptTail[1].x = sizeWnd.cx - nTIP_MARGIN;
   if ( ptTail[2].x < nTIP_MARGIN )
      ptTail[2].x = nTIP_MARGIN;
   if ( ptTail[2].x > sizeWnd.cx - nTIP_MARGIN )
      ptTail[2].x = sizeWnd.cx - nTIP_MARGIN;
 
   // get window position
   CPoint ptAnchor = GetAnchorPoint();
   CPoint ptOffs(ptAnchor.x - ptTail[1].x, ptAnchor.y - ptTail[1].y);
 
   // adjust position so all is visible
   CRect rectScreen;
   GetAnchorScreenBounds(rectScreen);
   int nAdjustX = 0;
   int nAdjustY = 0;
   if ( ptOffs.x < rectScreen.left )
      nAdjustX = rectScreen.left-ptOffs.x;
   else if ( ptOffs.x + sizeWnd.cx >= rectScreen.right )
      nAdjustX = rectScreen.right - (ptOffs.x + sizeWnd.cx);
   if ( ptOffs.y + nTIP_TAIL < rectScreen.top )
      nAdjustY = rectScreen.top - (ptOffs.y + nTIP_TAIL);
   else if ( ptOffs.y + sizeWnd.cy - nTIP_TAIL >= rectScreen.bottom )
      nAdjustY = rectScreen.bottom - (ptOffs.y + sizeWnd.cy - nTIP_TAIL);
 
   // reposition tail
   // uncomment two commented lines below to move entire tail 
   // instead of just anchor point
 
   //ptTail[0].x -= nAdjustX;
   ptTail[1].x -= nAdjustX;
   //ptTail[2].x -= nAdjustX;
   ptOffs.x    += nAdjustX;
   ptOffs.y    += nAdjustY;
 
   // place window
   MoveWindow(ptOffs.x, ptOffs.y, sizeWnd.cx, sizeWnd.cy, TRUE);
 
   // apply region
   CRgn region;
   CRgn regionRound;
   CRgn regionComplete;
   region.CreatePolygonRgn(&ptTail[0], 3, ALTERNATE);
   regionRound.CreateRoundRectRgn(ptTopLeft.x,ptTopLeft.y,ptBottomRight.x,ptBottomRight.y,nTIP_MARGIN*3,nTIP_MARGIN*3);
   regionComplete.CreateRectRgn(0,0,1,1);
   regionComplete.CombineRgn(&region, &regionRound, RGN_OR);
 
   if ( NULL == m_rgnComplete.m_hObject )
      m_rgnComplete.CreateRectRgn(0,0,1,1);
 
   if ( !m_rgnComplete.EqualRgn(&regionComplete) )
   {
      m_rgnComplete.CopyRgn(&regionComplete);
      SetWindowRgn((HRGN)regionComplete.Detach(), TRUE);
 
      // There is a bug with layered windows and NC changes in Win2k
      // As a workaround, redraw the entire window if the NC area changed.
      // Changing the anchor point is the ONLY thing that will change the
      // position of the client area relative to the window during normal
      // operation.
      RedrawWindow(NULL, NULL, RDW_UPDATENOW| RDW_ERASE | RDW_INVALIDATE | RDW_FRAME | RDW_ALLCHILDREN);
   }
}
 

 
// Returns the class ATOM for a BalloonHelp control.  Registers the class first, if necessary.
ATOM CBalloonHelp::GetClassAtom(BOOL bShadowed)
{
   if ( NULL == s_ClassAtom )
   {
      WNDCLASSEX wcx; 
 
      // Fill in the window class structure with parameters 
      // that describe the main window. 
 
      wcx.cbSize = sizeof(wcx);                 // size of structure 
      wcx.style = CS_DBLCLKS|CS_SAVEBITS
         |CS_DROPSHADOW;                        // notify of double clicks, save screen under, show dropshadow
      wcx.lpfnWndProc = AfxWndProc;             // points to window procedure 
      wcx.cbClsExtra = 0;                       // no extra class memory 
      wcx.cbWndExtra = 0;                       // no extra window memory 
      wcx.hInstance = AfxGetInstanceHandle();   // handle to instance 
      wcx.hIcon = NULL;                         // no app. icon 
      wcx.hCursor = LoadCursor(NULL,IDC_ARROW); // predefined arrow 
      wcx.hbrBackground = ::GetSysColorBrush(COLOR_WINDOW);                 // no background brush 
      wcx.lpszMenuName =  NULL;                 // no menu resource 
      wcx.lpszClassName = "BalloonHelpClassDS"; // name of window class 
      wcx.hIconSm = NULL;                       // no small class icon
 
      // Register the window class (this may not work if dropshadows are not supported)
      s_ClassAtomShadowed = RegisterClassEx(&wcx);
 
      // Register shadow-less class
      wcx.style &= ~CS_DROPSHADOW;
      wcx.lpszClassName = "BalloonHelpClass";
      s_ClassAtom = RegisterClassEx(&wcx);
   }
 
   if ( bShadowed && NULL != s_ClassAtomShadowed )
      return s_ClassAtomShadowed;
   return s_ClassAtom;
}
 

// Displays the balloon on the screen, performing fade-in if enabled.
void CBalloonHelp::ShowBalloon(void)
{
   ShowWindow(SW_SHOWNOACTIVATE);
   if ( !(m_unOptions&unDELAY_CLOSE) )
      SetTimeout(m_unTimeout);     // start close timer
}
 
// Removes the balloon from the screen, performing the fade-out if enabled
void CBalloonHelp::HideBalloon(void)
{
   if ( m_unOptions&unDELAY_CLOSE )
   {
      m_unOptions &= ~(unDELAY_CLOSE|unCLOSE_ON_ANYTHING);  // close only via timer or button
      SetTimeout(m_unTimeout);     // start close timer
      return;
   }
   ShowWindow( SW_HIDE );
   if ( GetCapture() == this ) 
      ReleaseCapture();
   DestroyWindow();
}
 
//
// Keyboard hook
//
 
void CBalloonHelp::SetKeyboardHook()
{
	if (m_bKeyboardHook){ return; }
	CBalloonHelp::s_hookMan.SetKeyboardHook();
	m_bKeyboardHook=true;
}
 
void CBalloonHelp::RemoveKeyboardHook()
{
	if (!m_bKeyboardHook){ return; }
	CBalloonHelp::s_hookMan.RemoveKeyboardHook();
	m_bKeyboardHook=false;
}
 

//
// Mouse hook
//
 
void CBalloonHelp::SetMouseHook()
{
	if (m_bMouseHook){ return; }
	CBalloonHelp::s_hookMan.SetMouseHook();
	m_bMouseHook=true;
}
 
void CBalloonHelp::RemoveMouseHook()
{
	if (!m_bMouseHook){ return; }
	CBalloonHelp::s_hookMan.RemoveMouseHook();
	m_bMouseHook=false;
}
 
//
// Call Window Return hook
//
 
void CBalloonHelp::SetCallWndRetHook()
{
	if (m_bCallWndRetHook){ return; }
	CBalloonHelp::s_hookMan.SetCallWndRetHook();
	m_bCallWndRetHook=true;
}
 
void CBalloonHelp::RemoveCallWndRetHook()
{
	if (!m_bCallWndRetHook){ return; }
	CBalloonHelp::s_hookMan.RemoveCallWndRetHook();
	m_bCallWndRetHook=false;
}
 
/////////////////////////////////////////////////////////////////////////////
// CBalloonHelp message handlers
 
BEGIN_MESSAGE_MAP(CBalloonHelp, CWnd)
   ON_WM_ERASEBKGND()
   ON_WM_PAINT()
   ON_WM_NCPAINT()
   ON_WM_LBUTTONDOWN()
   ON_WM_LBUTTONUP()
   ON_WM_NCCALCSIZE()
   ON_WM_TIMER()
   ON_WM_NCHITTEST()
   ON_WM_MOUSEMOVE()
   ON_WM_DESTROY()
   ON_WM_CLOSE()
   ON_WM_SHOWWINDOW()
   ON_MESSAGE(WM_PRINT, OnPrint)
   ON_MESSAGE(WM_PRINTCLIENT, OnPrintClient)
END_MESSAGE_MAP()
 
void CBalloonHelp::OnShowWindow(BOOL bShow, UINT)
{
   if ( NULL != m_fnAnimateWindow )
   {
      if ( bShow && !(m_unOptions&unDISABLE_FADEIN) )
         m_fnAnimateWindow( m_hWnd, 200, AW_BLEND);
      else if ( !bShow && !(m_unOptions&unDISABLE_FADEOUT) )
         m_fnAnimateWindow( m_hWnd, 200, AW_HIDE | AW_BLEND );
   }
}
 
// Erase client area of balloon
BOOL CBalloonHelp::OnEraseBkgnd(CDC* pDC) 
{
   CRect rect;
   GetClientRect(&rect);
   pDC->FillSolidRect(&rect, m_crBackground);
   return TRUE;
}
 
// draw balloon client area (title & contents)
void CBalloonHelp::OnPaint() 
{
   CPaintDC dc(this); // device context for painting
   DrawClientArea(&dc);
}
 
// draw balloon shape & border
void CBalloonHelp::OnNcPaint() 
{
   CWindowDC dc(this);
   DrawNonClientArea(&dc);
}
 
// draw the window into the specified device context
LRESULT CBalloonHelp::OnPrint(WPARAM wParam, LPARAM lParam)
{
   CDC* pDC = CDC::FromHandle((HDC)wParam);
   if ( lParam & PRF_NONCLIENT  ) 
      DrawNonClientArea(pDC);
   return Default();
}
 
// draw the client area into the specified device context
LRESULT CBalloonHelp::OnPrintClient(WPARAM wParam, LPARAM lParam)
{
   CDC* pDC = CDC::FromHandle((HDC)wParam);
   if ( lParam & PRF_ERASEBKGND ) 
      SendMessage( WM_ERASEBKGND, wParam );
   if ( lParam & PRF_CLIENT ) 
      DrawClientArea(pDC);
   return 0;
}
 
// Close button handler
void CBalloonHelp::OnLButtonDown(UINT, CPoint point) 
{
   if (m_unOptions & unSHOW_CLOSE_BUTTON)
   {
      CRect rect;
      GetClientRect(&rect);
      rect.left = rect.right-::GetSystemMetrics(SM_CXSIZE);
      rect.bottom = rect.top+::GetSystemMetrics(SM_CYSIZE);
      if ( rect.PtInRect(point) )
      {
         m_uCloseState |= DFCS_PUSHED;
         SetCapture();
         OnMouseMove(0, point);
      }
   }
}
 
// Close button handler,
// URL handler
void CBalloonHelp::OnLButtonUp(UINT, CPoint point) 
{
   if ( (m_unOptions & unSHOW_CLOSE_BUTTON) && (m_uCloseState & DFCS_PUSHED) )
   {
      ReleaseCapture();
      m_uCloseState &= ~DFCS_PUSHED;
      CRect rect;
      GetClientRect(&rect);
      rect.left = rect.right-::GetSystemMetrics(SM_CXSIZE);
      rect.bottom = rect.top+::GetSystemMetrics(SM_CYSIZE);
      if ( rect.PtInRect(point) )
         HideBalloon();
   }
   else if ( !m_strURL.IsEmpty() )
   {
      CRect rect;
      GetClientRect(&rect);
      if ( rect.PtInRect(point) )
      {
         ::ShellExecute(NULL, NULL, m_strURL, NULL, NULL, SW_SHOWNORMAL);
         HideBalloon();
      }
   }
}
 
//
// Ensure WM_MOUSEMOVE messages are sent for the entire window
//
LRESULT CBalloonHelp::OnNcHitTest(CPoint)
{
   return HTCLIENT;
}
 
//
// do mouse tracking:
//   Tracking for close button;
//
void CBalloonHelp::OnMouseMove(UINT, CPoint point)
{
   if (m_unOptions & unSHOW_CLOSE_BUTTON)
   {
      CRect rect;
      GetClientRect(&rect);
      rect.left = rect.right-::GetSystemMetrics(SM_CXSIZE);
      rect.bottom = rect.top+::GetSystemMetrics(SM_CYSIZE);
      CClientDC dc(this);
      UINT uState = DFCS_CAPTIONCLOSE;
      BOOL bPushed = m_uCloseState&DFCS_PUSHED;
      m_uCloseState &= ~DFCS_PUSHED;
      if ( rect.PtInRect(point) )
      {
         uState |= DFCS_HOT;
         if ( bPushed )
            uState |= DFCS_PUSHED;
      }
      else
      {
         uState |= DFCS_FLAT;
      }
      if ( uState != m_uCloseState )
      {
         dc.DrawFrameControl(&rect, DFC_CAPTION, uState);
         m_uCloseState = uState;
      }
      if ( bPushed )
         m_uCloseState |= DFCS_PUSHED;
   }
}
 
// Ensures client area is the correct size relative to window size,
// presearves client contents if possible when moving.
void CBalloonHelp::OnNcCalcSize(BOOL bCalcValidRects, NCCALCSIZE_PARAMS FAR* lpncsp) 
{
   // nTIP_MARGIN pixel margin on all sides
   ::InflateRect(&lpncsp->rgrc[0], -nTIP_MARGIN,-nTIP_MARGIN);
 
   // nTIP_TAIL pixel "tail" on side closest to anchor
   switch ( GetBalloonQuadrant() )
   {
   case BQ_TOPRIGHT:
   case BQ_TOPLEFT:
      lpncsp->rgrc[0].top += nTIP_TAIL;
      break;
   case BQ_BOTTOMRIGHT:
   case BQ_BOTTOMLEFT:
      lpncsp->rgrc[0].bottom -= nTIP_TAIL;
      break;
   }
 
   // sanity: ensure rect does not have negative size
   if ( lpncsp->rgrc[0].right < lpncsp->rgrc[0].left )
      lpncsp->rgrc[0].right = lpncsp->rgrc[0].left;
   if ( lpncsp->rgrc[0].bottom < lpncsp->rgrc[0].top )
      lpncsp->rgrc[0].bottom = lpncsp->rgrc[0].top;
 
   if ( bCalcValidRects )
   {
      // determine if client position has changed relative to the window position
      // if so, don't bother presearving anything.
      if ( !::EqualRect(&lpncsp->rgrc[0], &lpncsp->rgrc[2]) )
      {
         ::SetRectEmpty(&lpncsp->rgrc[2]);
      }
   }
}
 
// handle kill timer
void CBalloonHelp::OnTimer(UINT_PTR nIDEvent) 
{
   // really shouldn't be any other timers firing, but might as well make sure
   if ( nIDEvent == ID_TIMER_CLOSE )
   {
      KillTimer(m_unTimerClose);
      HideBalloon();
   }
}
 
// Called as the window is being destroyed.  Completes destruction after removing keyboard hook.
void CBalloonHelp::OnDestroy()
{
   // remove hooks
   RemoveMouseHook();
   RemoveKeyboardHook();
   RemoveCallWndRetHook();
 
   // destroy
   CWnd::OnDestroy();
}
 
// close the balloon, performing any set transition effect.
void CBalloonHelp::OnClose()
{
   HideBalloon();
}
 
// Called after window has been destroyed.  Destroys the object if option is set.
void CBalloonHelp::PostNcDestroy()
{
   CWnd::PostNcDestroy();
  
   // free object if requested
   // be careful with this one :D
   if ( m_unOptions & unDELETE_THIS_ON_CLOSE )
      delete this;
}
 
// Keyboard hook: used to implement the unCLOSE_ON_KEYPRESS option
LRESULT CBalloonHelp::KeyboardHookProc( int code, WPARAM wParam, LPARAM lParam)
{
   // Skip if the key was released or if it's a repeat
   // Bit 31:  Specifies the transition state. The value is 0 if the key  
   //       is being pressed and 1 if it is being released (see MSDN).
   if ( code>=0 && !(lParam&0x80000000) && NULL != m_hWnd )
   {
      PostMessage(WM_CLOSE);
   }
   return 0;
// return ::CallNextHookEx(m_hKeyboardHook, code, wParam, lParam);
}
 
// Mouse hook: used to implement un-obtrusive mouse tracking
LRESULT CBalloonHelp::MouseHookProc(int code, WPARAM wParam, LPARAM lParam)
{
   if (code>=0 && NULL != m_hWnd )
   {
      switch ( (UINT)wParam )
      {
      case WM_NCMOUSEMOVE:
      case WM_MOUSEMOVE:
         if ((m_unOptions & unCLOSE_ON_MOUSE_MOVE))
         {
            CPoint pt;
            ::GetCursorPos(&pt);
			if ((abs(pt.x-m_ptMouseOrig.x) > m_nMouseMoveToleranceX || abs(pt.y-m_ptMouseOrig.y) > m_nMouseMoveToleranceY) ){
               PostMessage(WM_CLOSE);
			   return 1;
			}
         }
         break;
      case WM_NCLBUTTONDOWN:
      case WM_LBUTTONDOWN:
         if ((m_unOptions & unCLOSE_ON_LBUTTON_DOWN)){
            PostMessage(WM_CLOSE);
		    return 1;
		 }
         break;
      case WM_NCMBUTTONDOWN:
      case WM_MBUTTONDOWN:
         if ((m_unOptions & unCLOSE_ON_MBUTTON_DOWN)){
            PostMessage(WM_CLOSE);
		    return 1;
		 }
         break;
      case WM_NCRBUTTONDOWN:
      case WM_RBUTTONDOWN:
         if ((m_unOptions& unCLOSE_ON_RBUTTON_DOWN)){
            PostMessage(WM_CLOSE);
		    return 1;
		 }
         break;
      case WM_NCLBUTTONUP:
      case WM_LBUTTONUP:
         if ((m_unOptions & unCLOSE_ON_LBUTTON_UP)){
            PostMessage(WM_CLOSE);
		    return 1;
		 }
         break;
      case WM_NCMBUTTONUP:
      case WM_MBUTTONUP:
         if ((m_unOptions & unCLOSE_ON_MBUTTON_UP)){
            PostMessage(WM_CLOSE);
		    return 1;
		 }
         break;
      case WM_NCRBUTTONUP:
      case WM_RBUTTONUP:
         if ((m_unOptions & unCLOSE_ON_RBUTTON_UP)){
            PostMessage(WM_CLOSE);
		    return 1;
		 }
         break;
      }
   }
   return 0;
}
 
// Window Return hook: used to implement window following
LRESULT CBalloonHelp::CallWndRetProc(int code, WPARAM wParam, LPARAM lParam)
{
   if (code>=0 && NULL != m_hWnd )
   {
      CWPRETSTRUCT* pcwpr = (CWPRETSTRUCT*)lParam;
      if ( WM_MOVE == pcwpr->message && pcwpr->hwnd == m_hwndAnchor )
         PositionWindow();
   }
 
   return 0;
// return ::CallNextHookEx(m_hCallWndRetHook, code, wParam, lParam);
}
 

//---------------------------------------------------------------------------------
//CBalloonHelp::HookMan
//  Singleton that broadcast hook events to all classes that currently exist.
//---------------------------------------------------------------------------------
 
CBalloonHelp::HookMan::HookMan()
{
	m_hKeyboardHook = NULL;
	m_hMouseHook = NULL;
	m_hCallWndRetHook = NULL;
	m_nCountKeyboard = 0;
	m_nCountMouse = 0;
	m_nCountCallWnd = 0;
}
 
CBalloonHelp::HookMan::~HookMan()
{
	while(m_nCountKeyboard > 0){ RemoveKeyboardHook(); }
	while(m_nCountMouse > 0){ RemoveMouseHook(); }
	while(m_nCountCallWnd > 0){ RemoveCallWndRetHook(); }
	m_hKeyboardHook = NULL;
	m_hMouseHook = NULL;
	m_hCallWndRetHook = NULL;
}
 
void CBalloonHelp::HookMan::AddClass(CBalloonHelp* pClass)
{
	RemoveClass(pClass);
	CSingleLock monCS(&m_cs);
	//Newer balloons get message precedence over older balloons
	m_lstClasses.push_front(pClass);
}
 
void CBalloonHelp::HookMan::RemoveClass(CBalloonHelp* pClass)
{
	CSingleLock monCS(&m_cs);
	std::list<CBalloonHelp*>::iterator itrEnd = m_lstClasses.end();
	for (std::list<CBalloonHelp*>::iterator itr = m_lstClasses.begin(); itr != itrEnd; ){
		if (*itr == pClass){ itr = m_lstClasses.erase(itr); }
		else{ itr++; }
	}
}
 
// Keyboard hook
void CBalloonHelp::HookMan::SetKeyboardHook()
{
	CSingleLock monCS(&m_cs);
	m_nCountKeyboard++;
	if ( NULL==m_hKeyboardHook )
	{
		m_hKeyboardHook = ::SetWindowsHookEx(WH_KEYBOARD,KeyboardHookProcStatic, NULL, ::GetCurrentThreadId());
	}
}
 
void CBalloonHelp::HookMan::RemoveKeyboardHook()
{
	CSingleLock monCS(&m_cs);
	m_nCountKeyboard--;
	if (m_nCountKeyboard <= 0 && NULL != m_hKeyboardHook){
		::UnhookWindowsHookEx(m_hKeyboardHook);
		m_hKeyboardHook=NULL;
		m_nCountKeyboard=0;
	}
}
 
// Mouse hook
void CBalloonHelp::HookMan::SetMouseHook()
{
	CSingleLock monCS(&m_cs);
	m_nCountMouse++;
	if ( NULL==m_hMouseHook )
	{
		m_hMouseHook = ::SetWindowsHookEx(WH_MOUSE,MouseHookProcStatic, NULL, ::GetCurrentThreadId());
	}
}
 
void CBalloonHelp::HookMan::RemoveMouseHook()
{
	CSingleLock monCS(&m_cs);
	m_nCountMouse--;
	if (m_nCountMouse <= 0 && NULL != m_hMouseHook){
		::UnhookWindowsHookEx(m_hMouseHook);
		m_hMouseHook=NULL;
		m_nCountMouse=0;
	}
}
 
// Call Window Return hook
void CBalloonHelp::HookMan::SetCallWndRetHook()
{
	CSingleLock monCS(&m_cs);
	m_nCountCallWnd++;
	if ( NULL==m_hCallWndRetHook )
	{
		m_hCallWndRetHook = ::SetWindowsHookEx(WH_CALLWNDPROCRET, CallWndRetProcStatic, NULL, ::GetCurrentThreadId());
	}
}
 
void CBalloonHelp::HookMan::RemoveCallWndRetHook()
{
	CSingleLock monCS(&m_cs);
	m_nCountCallWnd--;
	if (m_nCountCallWnd <= 0 && NULL != m_hCallWndRetHook){
		::UnhookWindowsHookEx(m_hCallWndRetHook);
		m_hCallWndRetHook=NULL;
		m_nCountCallWnd=0;
	}
}
 
LRESULT CALLBACK CBalloonHelp::HookMan::KeyboardHookProcStatic( int code, WPARAM wParam, LPARAM lParam)
{
	try{ 
		CSingleLock monCS(&CBalloonHelp::s_hookMan.m_cs);
		try{
			std::list<CBalloonHelp*>::iterator itrEnd = CBalloonHelp::s_hookMan.m_lstClasses.end();
			for (std::list<CBalloonHelp*>::iterator itr = CBalloonHelp::s_hookMan.m_lstClasses.begin(); itr != itrEnd; itr++){
				try{ if (((CBalloonHelp*)(*itr))->KeyboardHookProc(code, wParam, lParam)){ break; } }catch(...){}
			}
		}catch(...){}
		if (NULL != CBalloonHelp::s_hookMan.m_hKeyboardHook){ return ::CallNextHookEx(CBalloonHelp::s_hookMan.m_hKeyboardHook, code, wParam, lParam); }
	}catch(...){}
	return 0;
}
LRESULT CALLBACK CBalloonHelp::HookMan::MouseHookProcStatic(int code, WPARAM wParam, LPARAM lParam)
{
	try{ 
		CSingleLock monCS(&CBalloonHelp::s_hookMan.m_cs);
		try{
			std::list<CBalloonHelp*>::iterator itrEnd = CBalloonHelp::s_hookMan.m_lstClasses.end();
			for (std::list<CBalloonHelp*>::iterator itr = CBalloonHelp::s_hookMan.m_lstClasses.begin(); itr != itrEnd; itr++){
				try{ if (((CBalloonHelp*)(*itr))->MouseHookProc(code, wParam, lParam)){ break; } }catch(...){}
			}
		}catch(...){}
		if (NULL != CBalloonHelp::s_hookMan.m_hMouseHook){ return ::CallNextHookEx(CBalloonHelp::s_hookMan.m_hMouseHook, code, wParam, lParam); }
	}catch(...){}
	return 0;
}
LRESULT CALLBACK CBalloonHelp::HookMan::CallWndRetProcStatic(int code, WPARAM wParam, LPARAM lParam)
{
	try{ 
		CSingleLock monCS(&CBalloonHelp::s_hookMan.m_cs);
		try{
			std::list<CBalloonHelp*>::iterator itrEnd = CBalloonHelp::s_hookMan.m_lstClasses.end();
			for (std::list<CBalloonHelp*>::iterator itr = CBalloonHelp::s_hookMan.m_lstClasses.begin(); itr != itrEnd; itr++){
				try{ if (((CBalloonHelp*)(*itr))->CallWndRetProc(code, wParam, lParam)){ break; } }catch(...){}
			}
		}catch(...){}
		if (NULL != CBalloonHelp::s_hookMan.m_hCallWndRetHook){ return ::CallNextHookEx(CBalloonHelp::s_hookMan.m_hCallWndRetHook, code, wParam, lParam); }
	}catch(...){}
	return 0;
}
 
CBalloonHelp::HookMan CBalloonHelp::s_hookMan;
 
End.

Generalwin32 version PinmemberFrik Strecker4-Jun-06 23:57 
GeneralDoes not compile on VS 2005 PinmemberWhiTeWo1F18-Dec-05 20:04 
GeneralRe: Does not compile on VS 2005 PinmemberAndriy Mochalskyy21-Dec-05 14:23 
QuestionRe: Does not compile on VS 2005 Pinmemberdsfb11-Oct-07 5:42 
GeneralFails under Windows 2003 SP1 PinmemberBeheader1-Nov-05 3:06 
GeneralRe: Fails under Windows 2003 SP1 Pinmembergrigsoft4-Jan-06 4:29 
GeneralRe: Fails under Windows 2003 SP1 Pinmemberdoctorcja8-Jan-06 14:49 
GeneralRe: Fails under Windows 2003 SP1 Pinmemberblimeyoriley15-Feb-06 1:48 
GeneralRe: Fails under Windows 2003 SP1 PinmemberAdy Rockall23-Feb-06 9:07 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web04 | 2.8.140721.1 | Last Updated 8 Aug 2002
Article Copyright 2001 by Shog9
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid