WINGDIAPI BOOL WINAPI TransparentBlt(HDC,int,int,int,int,HDC,int,int,int,int,UINT);
The TransparentBlt function performs a bit-block transfer of the color data corresponding to a rectangle of pixels from the specified source device context into a destination device context.
BOOL TransparentBlt(
HDC hdcDest,
int nXOriginDest,
int nYOriginDest,
int nWidthDest,
int hHeightDest,
HDC hdcSrc,
int nXOriginSrc,
int nYOriginSrc,
int nWidthSrc,
int nHeightSrc,
UINT crTransparent
);
crTransparent
The RGB color in the source bitmap to treat as transparent.
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