typedef struct tagEMRMASKBLT
{
    EMR     emr;
    RECTL   rclBounds;          
    LONG    xDest;
    LONG    yDest;
    LONG    cxDest;
    LONG    cyDest;
    DWORD   dwRop;
    LONG    xSrc;
    LONG    ySrc;
    XFORM   xformSrc;           
    COLORREF crBkColorSrc;      
    DWORD   iUsageSrc;          
                                
    DWORD   offBmiSrc;          
    DWORD   cbBmiSrc;           
    DWORD   offBitsSrc;         
    DWORD   cbBitsSrc;          
    LONG    xMask;
    LONG    yMask;
    DWORD   iUsageMask;         
    DWORD   offBmiMask;         
    DWORD   cbBmiMask;          
    DWORD   offBitsMask;        
    DWORD   cbBitsMask;         
} EMRMASKBLT, *PEMRMASKBLT;