What message would i watch for to prevent a bitblt from running when a window is dragged over mine. For instance i have text that scrolls on my window but if i have notpad open as my active window and i drag it then my window will redraw and show the text i dont want to show as it should be scrolling. I have the app working perfect other than this problem. If you minimize and maximize a window over mine it is ok.
WM_PAINT (particularly the clipping rectangle). The answer is probably much more complicated than this, some more information would help.
Cheers,
Zooba :U