Re: CPaintDC class

NickP wrote:
Stupid or not, BitBlt will not paint outside the invalid region in a WM_PAINT call. There may be some performance difference when you use the PAINTSTRUCT variable to clip painting yourself, but I have no information on that.

This is interesting, to be safe i'm using the PAINTSTRUCT. Thanks for your help :-)

Actually, it's not matter of safety. Destination DC will clip everything outside clip region anyway. However, by knowing update region beforehand, you can optimize your painting code a little bit by omitting the painting of unnecessary parts of client area.
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