Parameters:
po: Pointer to the IGraphics interface object.
destX: Specifies the x-coordinates of the upper left corner of the destination rectangular area.
destY: Specifies the y-coordinates of the upper left corner of the destination rectangular area.
destW: Destination width.
destH: Destination height.
pbmSource: Pointer to a Windows BMP structure containing the source bitmap. The data beening pointed is without the AEE header. The data should start from BITMAPFILEHEADER. The BMP should be
noncompressed.
dwRopCode: Specifies the Raster operation that must be used while doing the bit-block transfer.