tom.oram@vodafone.net
My Program hangs!!!
Author
I have a Problem:-
My program create a window in then the WindowProc goes like this
switch(uMsg)
{
case WM_KEYDOWN:
case WM_DESTROY:
PostQuitMessage(0);
break;
}
If I press a key the program exits nicely...if I hit Alt+F4 or hit the Close ([X]) button the program hangs...
WHY???
thanx in advance
tom.oram@vodafone.net
tom.oram@vodafone.net
I believe that you need to call the DefaultWindow Procedure to handle all other widows calls that you don''t specify in your window procedure. This might fix the problem. Cheers!
Author
I do call the DefWindowProc but I don''t even think it gets to the WM_DESTROY...it hangs before...I think
If you think it might be hanging earlier, you can always throw in a WM_CLOSE case and then breakpoint it to see if you make it there. Better yet, do some logging (assuming your project is going to be large enough to bother).
Why don''t you do something like this, assuming that you want your app to close when the user hits a key: (just to be safe!)
switch(uMsg)
{
case WM_KEYDOWN:
{
PostQuitMessage(0);
break;
}
case WM_DESTROY:
{
PostQuitMessage(0);
break;
}
}
switch(uMsg)
{
case WM_KEYDOWN:
{
PostQuitMessage(0);
break;
}
case WM_DESTROY:
{
PostQuitMessage(0);
break;
}
}
anothing thing.. when you handle a message, you dont break, you return (except for special cases).. like this
case WM_DESTROY:
PostQuitMessage(0);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
switch(uMsg)
{
case WM_KEYDOWN:
case WM_DESTROY:
PostQuitMessage(0);
break;
}
-and-
switch(uMsg)
{
case WM_KEYDOWN:
{
PostQuitMessage(0);
break;
}
case WM_DESTROY:
{
PostQuitMessage(0);
break;
}
}
are exactly the same. IMO, I think the first one is easier to read.
-Icarus
{
case WM_KEYDOWN:
case WM_DESTROY:
PostQuitMessage(0);
break;
}
-and-
switch(uMsg)
{
case WM_KEYDOWN:
{
PostQuitMessage(0);
break;
}
case WM_DESTROY:
{
PostQuitMessage(0);
break;
}
}
are exactly the same. IMO, I think the first one is easier to read.
-Icarus
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