Microsoft Foundation Classes (mfc.hlp) (Table of Contents; Topic list)
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CDC::ExcludeUpdateRgn
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──Microsoft Foundation Classes──────────────────────────────────────────────
 
  int ExcludeUpdateRgn( CWnd* pWnd );
 
  Parameter   Description
 
  <pWnd>      Points to the window object whose window is being updated.
 
  Remarks
 
  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.
 
  Return Value
 
  The type of excluded region. It can be any one of the following values:
 
  Value           Meaning
 
  COMPLEXREGION   The region has overlapping borders.
 
  ERROR           No region was created.
 
  NULLREGION      The region is empty.
 
  SIMPLEREGION    The region has no overlapping borders.
 
  See Also
 
  ◄::ExcludeUpdateRgn►
 
 
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