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Hi perlmunger
Thanks a lot for your advises,they are very useful for us , I will avoid using Kill method and try to trace out the wrong thing in my App.
I will get back to you if any doubts.
Thanks
Aruna
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1. There is codeproject article on capturing hardware key events.
2. You can add a background image to a form by overriding the paint event and using GDI to draw a bitmap on the form. I do this.
3. me.close, then application.exit
If you still have the problem use the debugger to see if the application is hanging during the form's dispose event and determine which object is causing the problem.
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I develop own SIP (Soft Input Panel) which should have an opportunity to recognize the symbols drawn on all screen. Like Transcriber, but only for separate symbols. Has collided with 2 problems:
1) Interception of mouse events (can't set global hook)
2) If to draw on screen: GetDC(0)... after drawing it is impossible to refresh screen.
First method (I also tried to use NULL instead of GetDesktopWindow() in all methods)
#define SetWindowRedraw(hwnd, fRedraw) \
((void)SNDMSG(hwnd, WM_SETREDRAW, (WPARAM)(BOOL)(fRedraw),0L))
SetWindowRedraw(GetDesktopWindow(), TRUE);
RedrawWindow(GetDesktopWindow(), NULL, NULL, RDW_INVALIDATE |RDW_UPDATENOW |RDW_ALLCHILDREN);
Second method:
InvalidateRect(GetDesktopWindow(),NULL,FALSE);
UpdateWindow(GetDesktopWindow());
Third method:
RedrawWindow(GetDesktopWindow(),NULL,NULL,RDW_INVALIDATE|RDW_ALLCHILDREN|RDW_UPDATENOW );
Whether there are other ways of realization of drawing and recognition on all screen? Thought above creation of a topmost window with copying a contained desktop, but it would be desirable, all the same to make similarly Transcriber
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.cpp
In XXX_Init
...
ActivateKBHook(GetModuleHandle(NULL), LowLevelKeyboardProc);
...
Rest of code:
//globals
HINSTANCE g_hHookApiDLL = NULL; //handle to coredll.dll, where all the hook related APIs are present
HHOOK g_hInstalledLLKBDhook = NULL; //g_hInstalledLLKBDhook represents handle to the installed KB hook
//WINCEKBHOOK_API BOOL ActivateKBHook(HINSTANCE hInstance, HOOKPROC LLKeyboardHookCallbackFunction)
BOOL ActivateKBHook(HINSTANCE hInstance, HOOKPROC LLKeyboardHookCallbackFunction)
{
//we need to manually load these standard Win32 API calls
//MSDN states that these aren't supported in WinCE
SetWindowsHookEx = NULL;
CallNextHookEx = NULL;
UnhookWindowsHookEx = NULL;
//now load the coredll.dll
g_hHookApiDLL = LoadLibrary(_T("coredll.dll"));
if(g_hHookApiDLL == NULL)
{
//something is awfully wrong
//the dll has to be present
MessageBox(NULL, L"Can't Load coredll", L"Error", MB_OK);
return false;
}
else
{
//load the SetWindowsHookEx API call
//the SetWindowsHookEx function installs an application-defined hook procedure into a hook chain.
//You would install a hook procedure to monitor the system for certain types of events.
//here we use use the hook to monitor kyeboard events
SetWindowsHookEx = (_SetWindowsHookExW)GetProcAddress(g_hHookApiDLL, _T("SetWindowsHookExW"));
if(SetWindowsHookEx == NULL)
{
//this means that MS has really stopped supporting this API in WinCE
return false;
}
else
{
//install the KB hook
//the handle needs to be saved for default processing of the events and to uninstall the hook, once we re done with it
g_hInstalledLLKBDhook = SetWindowsHookEx(WH_KEYBOARD_LL, LLKeyboardHookCallbackFunction, hInstance, 0);
if(g_hInstalledLLKBDhook == NULL)
{
MessageBox(NULL, L"Can't Set Hook", L"Error", MB_OK);
return false;
}
}
//load CallNextHookEx() API call
//the CallNextHookEx function passes the hook information to the next hook procedure in the current hook chain.
//we use this call for default processing of events.
CallNextHookEx = (_CallNextHookEx)GetProcAddress(g_hHookApiDLL, _T("CallNextHookEx"));
if(CallNextHookEx == NULL)
{
MessageBox(NULL, L"Can't Call Hook", L"Error", MB_OK);
return false;
}
//load UnhookWindowsHookEx() API
//the UnhookWindowsHookEx function removes a hook procedure installed in a hook chain by the SetWindowsHookEx function.
//we use this call to unistall the hook.
UnhookWindowsHookEx = (_UnhookWindowsHookEx)GetProcAddress(g_hHookApiDLL, _T("UnhookWindowsHookEx"));
if(UnhookWindowsHookEx == NULL)
{
MessageBox(NULL, L"Can't Unhook Hook", L"Error", MB_OK);
return false;
}
}
//all the APIs are loaded and the application is hooked
return true;
}
//WINCEKBHOOK_API BOOL DeactivateKBHook()
BOOL DeactivateKBHook()
{
//unload the hook
if(g_hInstalledLLKBDhook != NULL)
{
UnhookWindowsHookEx(g_hInstalledLLKBDhook);
g_hInstalledLLKBDhook = NULL;
MessageBox(NULL, L"Unhooked Hook", L"Error", MB_OK);
}
//unload the coredll.dll
if(g_hHookApiDLL != NULL)
{
FreeLibrary(g_hHookApiDLL);
g_hHookApiDLL = NULL;
MessageBox(NULL, L"Unloaded DLL", L"Error", MB_OK);
}
//we have terminated gracefully
return true;
}
/****************************************************************
WH_KEYBOARD_LL hook procedure
****************************************************************/
LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
MessageBox(NULL, L"Callback", L"key", MB_OK);
CHAR szBuf[128];
HDC hdc;
static int c = 0;
size_t * pcch = 0;
HRESULT hResult;
if (nCode < 0) // do not process message
return CallNextHookEx(g_hInstalledLLKBDhook, nCode,wParam, lParam);
hdc = GetDC(NULL);
hResult = StringCchPrintf(CA2W(szBuf), 128/sizeof(TCHAR), L"KEYBOARD - nCode: %d, vk: %d, %d times ", nCode, wParam, c++);
if (FAILED(hResult))
{
// TODO: write error handler
}
hResult = StringCchLength(CA2W(szBuf), 128/sizeof(TCHAR), pcch);
if (FAILED(hResult))
{
// TODO: write error handler
}
MessageBox(NULL, CA2W(szBuf), L"key", MB_OK);
ReleaseDC(NULL, hdc);
return CallNextHookEx(g_hInstalledLLKBDhook, nCode, wParam, lParam);
}
In the header .h
#ifndef _WINCE_KB_HOOK_H
#define _WINCE_KB_HOOK_H
//used for passing to SetWindowsHookEx funtion to set a Low level (LL) keyboard hook
#define WH_KEYBOARD_LL 20
// Define the function types used by hooks
typedef LRESULT (CALLBACK* HOOKPROC)(int code, WPARAM wParam, LPARAM lParam);
typedef HHOOK (WINAPI *_SetWindowsHookExW)(int, HOOKPROC, HINSTANCE, DWORD);
typedef LRESULT (WINAPI *_CallNextHookEx)(HHOOK, int, WPARAM, LPARAM);
typedef LRESULT (WINAPI *_UnhookWindowsHookEx)(HHOOK);
// For the low level keyboard hook, your keyboards procedures is passed a pointer to KBDLLHOOKSTRUCT instance
typedef struct {
DWORD vkCode;
DWORD scanCode;
DWORD flags;
DWORD time;
ULONG_PTR dwExtraInfo;
} KBDLLHOOKSTRUCT, *PKBDLLHOOKSTRUCT;
// Win32 Hook APIs
static _SetWindowsHookExW SetWindowsHookEx;
static _UnhookWindowsHookEx UnhookWindowsHookEx;
static _CallNextHookEx CallNextHookEx;
//WINCEKBHOOK_API BOOL ActivateKBHook(HINSTANCE hInstance, HOOKPROC LLKeyboardHookCallbackFunction);
BOOL ActivateKBHook(HINSTANCE hInstance, HOOKPROC LLKeyboardHookCallbackFunction);
//WINCEKBHOOK_API BOOL DeactivateKBHook();
BOOL DeactivateKBHook();
#endif
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We are using SHNOTIFICATIONDATA to show icon on the upper toolbar on Windows
Mobile 5. But we can't find out how to send a message to our window when we
click on the icon, without showing any pop-up window.
Our code:
SHNOTIFICATIONDATA* pNotification = NULL;
HICON hIconn = NULL;
hIconn = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
pNotification = (SHNOTIFICATIONDATA*)malloc(sizeof(SHNOTIFICATIOND ATA));
pNotification->dwID = ICON_ID;
pNotification->clsid = guidPPCAlertsApp; npPriority = SHNP_INFORM;
pNotification->csDuration = 10; hwndSink = m_hWnd; pszHTML =
pNotification->_T("...");
pNotification->hicon = hIconn;
pNotification->cbStruct = sizeof(SHNOTIFICATIONDATA); pszTitle =
pNotification->TEXT("Application name"); grfFlags = SHNF_STRAIGHTTOTRAY;
SHNotificationAdd( pNotification );
!??
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Can sm one tell me which on is better from the programmer's point of view, using SIP or H.323 or the combination of these, considerig feasibility aspect in wireless communication?
sumit
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Hi, I need to work with an old database which I think is CEDB (.vol file), I'm developing in VS.Net 2005 (VB) and just need to do some basic bits. I have no idea what I'm doing!!! Any help whatsoever would be very much appreciated.
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Hi guys
have been asked to do some maintenance on a mobile app in VS 2005
when i build and runthe app the emulator fires up and reports the following error
"This application (Mytestapp.exe ) requires newer version of the Microsoft .net compact framework than the version installed on this device"
is there a fix for this?
i tried getting the .NET Compact Framework 2.0 Redistributable however it wont install onthe PC when it has VS 2005 on it (!)
how do i work around this issue as i dont have a physical device to use?
cheers
Bryce
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Dear Bryce - read the interweb
f you have VS 2005 installed and are developing the app then just connect to the device in VS and deploy it. Make sure your project properties has the
"Deploy the latest version of the .NET Compact Framework (including service packs)" checked. It is found under "Devices".
cheers
Bryce
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oh cool thanks Bryce
Bryce
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Hi,
I am SivaRamaRaju working as a .net developer.
In my asp.net mobile web application,I am displaying the list of contacts which are in the database. The problem here is I want to save the list of contacts in the mobile application to PDA (Personal Distal Assistance)
Can anybody help me how can I save these list of contacts to PDA
Thanks and regards
Siva.
-- modified at 0:31 Thursday 1st February, 2007
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hi all
plz tell me the way how to read the images from webcam in c#.net
and suggest the good tutorials
thank s in advance
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Hi,
I am doing my final thesis on bluetooth. I m trying to implement routing and sharing of services in bluetooth scartternet using c#. I need some initial help bcoz I m new to c#. Is there any API and any other resources that can help me.
Thanks
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Hi all,
I have a Embeded VC++ (4.0) application , which builds fine to run on a device having Win CE 4.2 , But when i try to build the same workspace to run on a device having Win CE 3.0. I get a "Platform Manager server failed error".
Do i need to do some configuration settings for the Platform Manager under Tools Menu?
What settings do i need to do?.
Thanks (in advance)
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You must use eVC 3.0 and an appropriate SDK for debugging/deployment on Windows CE 3.0-based devices. eVC 4.0 only works with CE 4.0 or later devices (you need at least SP1 for CE 4.1, SP3 for CE 4.1 and 4.2, and SP4 for CE 4.1, 4.2 and 5.0 - SP2 added 4.2 support but removed support for 4.1!) There were some changes in the OS's debugging support between v3.0 and 4.0.
It's recommended to install eVC 3.0 before 4.0 if you have the choice, but it should work if you install 3.0 after 4.0.
Download eVC 3.0 from here[^]. That includes the Pocket PC 2002 SDK.
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Thanks
modified 28-Sep-16 7:21am.
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Hello,I ever never thought about develop an application for winCE that will run on PDA. Now I have to do it during a short term.
Can anyone tell me the flow to develop winCE application ?
development tools:
.NET2005
vb.net
are there any samples for reading?
thanks...
limin...
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Hey Buddy,
I am facing same kind of problem. If you come across of some good resource kindly let me know. I will also inform you as soon as I got something concrete.
Saksham
Smart Device & Pocket PC Developer
developersaksham@gmail.com
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I'm developing an application on Win CE 4.2 using Visual Studio .Net 2003.
Just after calling InitializeComponent from the main form's constructor and before any line of InitializeComponent method being processed, the application gives an error (which is not catchable using try-catch block)
Fatal Application Error
Application Terminal.exe has performed an illegal operation and will be shut down. If the problem persists contact the program vendor.
Program: Terminal.exe
Exception: 0xc0000005
Address: 01690cdc
Any ideas?
Thanks in advance
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Hi
Can anyone tell me how to print out sth. from a pocket pc with windows mobile 5? I´ve searched the web but had no luck. I found this[^] on CodeProject, but i need to print pictures (in colors), too.
Would be fine if you could help me
THX
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Hello there
I am trying to move my CE based application from wCE 3/4 to vs 2005. I found out that all my database handling code needs to go into the bin, and I need to start from scartch...
My question, what should I use now - fro Windows Mobile 2003 / ARM architecture, C++ within vs 2005. It seems all my desire to use ADO is getting me to a dead end...
Hope someone can help
Thanks
Alex
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Hi
Been working on a small app that switches the gprs connection when the network is down. The problem lies in disconnecting a gprs connection. The call to ConnMgrReleaseConnection does not work,i have heard that you can use rasenumconnections then call hangup, but i get a constant error message ras error 632 which says the structure size is invalid the code is as follows
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct RASCONN
{
public UInt32 dwSize;
public IntPtr hRasConn;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 257)]
public string szEntryName;
}
// create a single rascon array
ConnectionManager.RASCONN[] connections = new ConnectionManager.RASCONN[maxRasConConnections];
connections[0].dwSize = (uint)Marshal.SizeOf(typeof(ConnectionManager.RASCONN));
// get the entries for the ras
int concount = 1;
int cb = Marshal.SizeOf(typeof(ConnectionManager.RASCONN)) * concount;
// enumerate the connections
int nRet = ConnectionManager.RasEnumConnections(connections, ref cb, ref concount);
it would seem that the dwsize is incorrect. its size is 540;
the program is designed to run on mobile 5
does anyone now a fix for this
thanks
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Connection Manager in Windows Mobile 5.0 is designed not to disconnect an existing GPRS connection. In most countries GPRS connections are charged per byte, not per minute, so it doesn't cost anything to leave it 'connected'. No additional power is consumed by using the GPRS connection over simply having the GSM radio powered on, if you're not actively sending data.
Connection Manager will hang up the connection if asked to create a connection to a different APN.
I can't imagine that disconnecting the underlying connection from underneath the Connection Manager is a good idea. It's not expecting it so pretty much anything could happen. Always be wary of undocumented techniques.
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Hello,
I am creating a PDA application using the CF 2.0 that will use a datagrid and will display time in one of the columns. The column is called "ScheduledTime" and in the sql server 2005 database the datatype is datetime.
I would like to format the time to display e.g. 21:45 24hr format.
I think the datagrid is very limited when using the CF for mobile applications as the property "format" doesn't exist for this. See my code below.
I am wondering is there another way to format time in a datagrid column using the CF 2.0.
Me.grdSupportContracts.DataSource = ds.Tables(0)<br />
Dim dgtbc As DataGridTextBoxColumn<br />
<br />
dgtbc = CType(Me.grdSupportContracts.TableStyles(0).GridColumnStyles(3), DataGridTextBoxColumn)<br />
dgtbc.Format 'Doesn't have the format property<br />
Many thanks in advance,
Steve
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