Re: MessageBox Problem - C / C++ / MFC Discussion Boards

Brigg Thorp22-May-02 1:24

22-May-02 1:24

Hey everyone,

I am working on an application that I would like to show up on the Windows Explorer context menu. I would like it to be like WinZip, where I add a menu item, then when you click on it, it sends the files to my application file list. I assume that I have to use the Shell API, but I didn't see any articles about this. I did see some on how to add Explorer's context menu to your own file list, but nothing to go the other way. Has anyone done this before and, if so, can you point me in the right direction?

Thanks...

Brigg Thorp
Software Engineer
Timex Corporation

Re: Adding app to Explorer context menu

Sonu Kapoor22-May-02 1:42

Sonu Kapoor

22-May-02 1:42

check this:

http://www.codeproject.com/shell/shellextguide1.asp

Best Regards

Sonu

List Control

Mazdak22-May-02 1:07

Mazdak

22-May-02 1:07

I have a list control in adialog box and I want to fill one column of it with a CStringList.This is the function that I use to fill list control.

int CSHowFileDlg::FillListCtrl(CStringList * filelist)
{
	LV_COLUMN   listColumn;
	LV_ITEM     listItem;

	listColumn.mask = LVCF_FMT|LVCF_WIDTH|LVCF_TEXT|LVCF_SUBITEM;
	listColumn.fmt = LVCFMT_LEFT;
	listColumn.cx = 120;
	
	listColumn.iSubItem = 1;
	listColumn.pszText = "File Name";
	m_listCtrl.InsertColumn( 1, &listColumn );

	listItem.mask = LVIF_TEXT ;
	listItem.iSubItem = 1;

	POSITION pos = filelist->GetHeadPosition();
	for(short i = 0 ; i < filelist->GetCount() ; i++ )
	{
		listItem.iItem = i;
		listItem.pszText = (LPSTR)(filelist->GetAt((pos++))).GetString();

		m_listCtrl.InsertItem( &listItem );
		

	}
	return 0;
}

There is no error but it show some of items correctly.Does anybody see anything wrong in this function?

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

Re: List Control

Mazdak22-May-02 1:52

Mazdak

22-May-02 1:52

Simple...I have to change GetAt(pos++) to GetNext(pos) Big Grin | :-D

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

ActiveX ToolBar

Tzoockee22-May-02 0:54

Tzoockee

22-May-02 0:54

How can I create a Toolbar that docks in Internet Explorer from an activex control that runs in Internet Explorer ?

MessageBox Problem

chen22-May-02 0:40

chen

22-May-02 0:40

Hi,

A simple MessageBox("Some errors") like this one works well.
But when i use the MessageBox(NULL, str, szMsg, MB_OK), there
is complier error. Where is my mistake?

Thanks in advance!

chen

Re: MessageBox Problem

Joaquín M López Muñoz22-May-02 0:51

Joaquín M López Muñoz

22-May-02 0:51

Your mistake is you're not providing the right argumtns. Check the docs for CWnd::MessageBox.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: MessageBox Problem

Zizilamoroso22-May-02 0:55

Zizilamoroso

22-May-02 0:55

I guess that the first arg cannot be NULL.

This will work:
MessageBox(strErrorText,strErrorTitle,MB_ICONSTOP|MB_OK);

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: MessageBox Problem

chen22-May-02 0:57

chen

22-May-02 0:57

No, the compiler error is due to the four parameters
used in MessageBox. It seems that i must include some
hearder files or Lib?

chen

Re: MessageBox Problem

Zizilamoroso22-May-02 2:45

Zizilamoroso

22-May-02 2:45

Maybe "afxwin.h".

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: MessageBox Problem

Michael P Butler22-May-02 1:20

Michael P Butler

22-May-02 1:20

If you are calling the message box from inside a CWnd dervied class then you don't need the NULL. It uses the current CWnd object for the parent window.

However you can use the same call by using ::MessageBox(NULL, str, szMsg, MB_OK) which calls the default API version.

Michael Smile | :)

Playing an OGG or MP3 in a demo?

22-May-02 0:38

Hi,
is there an easy solution to add music playback to a demo? I think about playing an OGG (or MP3). It would be great if I can name a file and say start, stop or control volume.... DLL or source code. Smile | :)

Re: Playing an OGG or MP3 in a demo?

Bug22-May-02 0:52

Bug

22-May-02 0:52

http://www.fmod.org/

Re: Playing an OGG or MP3 in a demo?

Mazdak22-May-02 1:13

Mazdak

22-May-02 1:13

For playing MP3 check this:

http://www.codeproject.com/audio/mp3player.asp

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

Re: Thx (Playing an OGG or MP3 in a demo?)

22-May-02 5:47

thx, will have a look on both Smile | :)

MFC Draw Text

22-May-02 0:23

hey guys/gals ,
Actually i am animating the window .when thw window is shown there is some text displayed in it which is not underlined and when the mouse (leave) moves the window i want the text to be underlined.
Actually i am getting the mouse leave event but dont understand why the text is not able to remove the underline part. If any body possibly can help me . Confused | :confused:

Re: MFC Draw Text

Michael P Butler22-May-02 1:23

Michael P Butler

22-May-02 1:23

How are you handling the painting. Does the paint function get called in the mouse leave event?

Posting the portion of the code that is giving you problems would be a great help.

Michael Smile | :)

GlobalAllocPtr

Zizilamoroso21-May-02 23:57

Zizilamoroso

21-May-02 23:57

What is the delete-function for memory allocated by GlobalAllocPtr?

tnx.

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: GlobalAllocPtr

Zizilamoroso22-May-02 0:08

Zizilamoroso

22-May-02 0:08

Could it be GlobalFreePtr? I don't find any docs about these macros on the msdn (tell something new Wink | ;)

).

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: GlobalAllocPtr

moliate22-May-02 0:23

moliate

22-May-02 0:23

GlobalFreePtr

Note that if you use Win32 there is really no need to use this. The Win32 memory archetecture does not keep a separate global heap. LocalAlloc and GlobalAlloc are the same, and both malloc and new eventually calls a similar function called HeapAlloc.

/moliate

Two o'clock and walking through familiar London - Or what was familiar London before the cursor deleted certain certainties -
I watch a suit and tie man giving suck to the Psion Organizer lodged in his breast pocket
its serial interface like a cool mouth hunting his chest for sustenance, familiar feeling, and I'm watching my breath steam in the air.

Neil Gaiman - Cold Colours

Re: GlobalAllocPtr

Zizilamoroso22-May-02 0:53

Zizilamoroso

22-May-02 0:53

But is it harmless if you do use it?

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: GlobalAllocPtr

moliate22-May-02 7:06

moliate

22-May-02 7:06

Yes, but it is only included for Win16 compability. It is a macro for allocating memory and locking the handle, which is not nessicary in Win32. Unlike Win16 memory allocation methods, Win32 methods have very few efficiency differences.

MSDN says that if you decide to use GlobalAllocPtr, GlobalFreePtr should be used to release the memory. This is probably just for backward compability, but better safe than sorry...

Cheers
/moliate

Neil Gaiman - Cold Colours

Debug vs Release version

21-May-02 22:44

It's really strange when your application works perfect under debug version, and later when you switch to Release it crashes. Here is how it happens.

1) I use CreateProcess to start a program and wait untill it ends.
CreateProcess of course crashes under Win2k/XP.
2) Then I switch to ShellExecute. Same thing happens.
3) I don't want to use WinExec!

So what's the difference between WinExec/ShellExecute/CreateProcess, and if you can provide some working code with theese functions

Regards,

Deian

Re: Debug vs Release version

Wolfram Steinke21-May-02 23:36

Wolfram Steinke

21-May-02 23:36

It is not surprising at all.

In dubug mode when you are using arrays or strings the compiler can reserve up to 16 bytes more that are actually needed. If you then write past the end of the memory and are still within that 'safe' area you will not have a problem. In release mode however even writing one byte past the end can cause a crash.

I would also take a careful look for memory and resource leaks some of which only cause an oject dump in debug mode but crash in release mode.

Happy programming!!

Re: Debug vs Release version

Alexandru Savescu22-May-02 0:13

Alexandru Savescu

22-May-02 0:13

Check out this article
It will not tell you what is going on withe CreateProcess and ShellExecute but it will give you an idea about the differences between Release mode and Debug mode

Best regards,
Alexandru Savescu

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