CDC::GetBkMode 

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intGetBkMode()const;

Return Value

The current background mode, which can be OPAQUE or TRANSPARENT.

Remarks

Returns the background mode. The background mode defines whether the system removes existing background colors on the drawing surface before drawing text, hatched brushes, or any pen style that is not a solid line.

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See Also   CDC::GetBkColor, CDC::SetBkColor, CDC::SetBkMode,