.NET Form and Message Loop

[Eric Robert]

Hi,

I am using C# code to create a window, get its HWND and pass it to an
unmanaged C++ DLL. This DLL has the code to process messages. My problem is
that I don't receive the WM_QUIT event so, my application never quits. If I
replace the WNDPROC with mine using a call to SetWindowLongPtr, and just
check for messages before passing them to the original WNDPROC, I don't even
get a WM_DESTROY message.

Any idea why this is happening? Any idea how to fix this?

Eric Robert

 

[Stoitcho Goutsev \(100\) [C# MVP]]

Hi Eric,

WM_QUIT is not sent to any window ever. It just causes GetMessage to return
0, which ends the message loop.

As far as WM_DESTROY is concerned my tests show that windows procedures
receive that message. For testing I used Spy++.