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CDC Class
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CDC::TransparentBlt

Visual Studio 2012

Call this member function to transfer a bit-block of the color data, which corresponds to a rectangle of pixels from the specified source device context, into a destination device context.

Copy 
BOOL TransparentBlt( 
   int xDest, 
   int yDest,
   int nDestWidth,
   int nDestHeight, 
   CDC* pSrcDC, 
   int xSrc, 
   int ySrc, 
   int nSrcWidth, 
   int nSrcHeight, 
   UINT clrTransparent  
);
xDest

Specifies the x-coordinate, in logical units, of the upper-left corner of the destination rectangle.

yDest

Specifies the y-coordinate, in logical units, of the upper-left corner of the destination rectangle.

nDestWidth

Specifies the width, in logical units, of the destination rectangle.

nDestHeight

Specifies the height, in logical units, of the destination rectangle.

pSrcDC

Pointer to the source device context.

xSrc

Specifies the x-coordinate, in logical units, of the source rectangle.

ySrc

Specifies the y-coordinate, in logical units, of the source rectangle.

nSrcWidth

Specifies the width, in logical units, of the source rectangle.

nSrcHeight

Specifies the height, in logical units, of the source rectangle.

clrTransparent

The RGB color in the source bitmap to treat as transparent.

TRUE if successful; otherwise FALSE.

TransparentBlt allows for transparency; that is, the RGB color indicated by clrTransparent is rendered transparent for the transfer.

For more information, see TransparentBlt in the Windows SDK.

Header: afxwin.h

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