Thread: WM_QUIT return values

In my program, under WM_DESTROY, I use PostQuitMessage(0). After my message loop, in WinMain(), I return msg.wParam. The exit code for my program however, is always -1080664280 (0xBF965F28). Is this behaviour normal? According to MSDN my exit code should be 0.

Here's the important stuff, should be enough:

Code:

LRESULT CALLBACK WndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
	switch (msg)
	{
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;

Code:

while (GetMessage(&msg,hwnd,0,0)>0)
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return msg.wParam;

Code:

The thread 0x170 has exited with code -1080664280 (0xBF965F28)

I've confirmed that it IS exiting through WM_DESTROY.

The message is 0! Weird. I think it may be because my message loop will exit if GetMessage() doesn't return a positive value. Eibro told me to change this. I'll try it and see.

I added the following check to my loop:

Code:

while ((bRet=GetMessage(&msg,hwnd,0,0))!=0)
	{
		if (bRet==-1)
			exit(1);
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return msg.wParam;

And sure enough it exited with code 1. Apparently that means there's some horrible error like hwnd being invalid. Could that be possible in this case?

If it returns -1 call GetLastError() and see what that says.