Excluding the Update Region
The ExcludeUpdateRgn function excludes the update region from the clipping region for the display device context. This function is useful when drawing in a window other than when a WM_PAINT message is processing. It prevents drawing in the areas that will be updated during the next WM_PAINT message.
Feedback
https://aka.ms/ContentUserFeedback.
Coming soon: Throughout 2024 we will be phasing out GitHub Issues as the feedback mechanism for content and replacing it with a new feedback system. For more information see:Submit and view feedback for