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CDC::TransparentBlt

  • Article

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.

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

Parameters

  • 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.

Return Value

TRUE if successful; otherwise FALSE.

Remarks

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.

Requirements

Header: afxwin.h

See Also

Reference

CDC Class

Hierarchy Chart

CDC::AlphaBlend

CDC::SetStretchBltMode