Hi experts,
Can anyone explain to me about the Wndproc? I'm currently doing conversion from Borland C++ to C++.NET and this is my first to encounter this WndProc since i'm not a Windows programmer. Is there anything alternative for this in .net? Please give me some idea about it.
Thanks,
5  2275  Plater 7,872
Recognized Expert Expert
WndProc() is the "message pump" for windows forms (actually I think any windows application can use it)
it gets all the messages like WM_MouseClick and things like that.
Now I'm unsure about the C++ in .NET, but VB.NET/C# don't really have a general use for overriding that function, as it has methods for mouseclicks and everything built in.
WndProc is a CALL BACK function used to respond the user events after the window has been created and displayed.It is not the message pump, the message pump is,
while(GetMessag e(&msg, NULL, 0, 0))
{
DispatchMessage (&msg):
}
The GetMessage() will get the message from the system message queue and give it to corresponding WndProc().The WndProc will handle the message accordingly.Sin ce it is a CALLBACK function, Windows Operating system will call the WndProc() not our application.
Regards,
Vinoth
Plater 7,872
Recognized Expert Expert
Hehe I was going to say I got schooled there, but GetMessage() is a win32 api function (or so msdn would claim) and not part of the .NET framework specifically.
For access to windows messages, you would use the WndProc() function
Thanks to all your response. I have a follow up questions to you guys.
How can I implement the WndProc in .Net? In Win32 it uses HWND as handle to the window but in .Net I think is only the message. If I have a SetTimer function which also need handle as parameter so how can I do that?
example;
//
// Create a timer to schedule updates
//
SetTimer( Handle, // handle to window
TIMER, // timer identifier
ONE_SECOND, // 1-second interval
(TIMERPROC) NULL); // no timer callback
In Wndproc()
...
if ( Message.WParam == TIMER )
...Do this...
What will be the equivalent of Handle??
Hope you can help me guys.
Plater 7,872
Recognized Expert Expert
The Message object in .NET has a property that is the handle to the window.
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