The Old New Thing

Why do we need IsDialogMessage at all?

April 16, 2012 Apr 16, 2012 04/16/12

Raymond Chen

alv wonders why we need the function at all. "All its activity could take place inside the window procedure of the modeless dialog itself", since when it doesn't have focus, it shouldn't be responding to messages anyway. Sure, that works great if the modeless dialog has focus. But it almost never does. What has focus is a control inside the...