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CDC::TransparentBlt

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

Concepts

CDC Class

CDC Members

Hierarchy Chart

CDC::AlphaBlend

CDC::SetStretchBltMode