原谅我的洛阳铲我也是这个问题
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PIMAGE pimg = newimage( 256, 256 );
getimage(pimg,"1.bmp",256,256);
putimage(40,72,pimg,SRCCOPY);

使用putimage_withalpha.
int EGEAPI putimage_withalpha(
PIMAGE imgdest, // handle to dest
PIMAGE imgsrc, // handle to source
int nXOriginDest, // x-coord of destination upper-left corner
int nYOriginDest, // y-coord of destination upper-left corner
int nXOriginSrc = 0, // x-coord of source upper-left corner
int nYOriginSrc = 0, // y-coord of source upper-left corner
int nWidthSrc = 0, // width of source rectangle
int nHeightSrc = 0 // height of source rectangle
);