Access violation while the program was idle - not trace information to track down the bug

Question

I have a program that just popped up an AV. Until now the Eureka Log could find the source code line that generated the error but now it displays only this:

Acc         


        

Answer 1

I don't see an EditWndProc() method in user32.dll, but Delphi has a couple -- one dealing with combobox messages and one dealing with tree views. Given MS's comctrl mess, I'd guess you have a tree view?

Check your tree view stuff. Given IntersectClipRect's parameters, it's easy to guess that it's being passed an invalid device context -- so...are you doing any custom painting for your tree view? If so, are you checking to make sure the canvas handle is ! NIL before you begin painting (try assertions if nothing else)?