CDC::ExcludeUpdateRgn
Prevents drawing within invalid areas of a window by excluding an updated region in the window from the clipping region associated with the CDC object.
int ExcludeUpdateRgn(
CWnd* pWnd
);
Parameters
- pWnd
Points to the window object whose window is being updated.
Return Value
The type of excluded region. It can be any one of the following values:
COMPLEXREGION The region has overlapping borders.
ERROR No region was created.
NULLREGION The region is empty.
SIMPLEREGION The region has no overlapping borders.
Requirements
Header: afxwin.h