绘制一个Image对象,pImage变量指向的内容不需要释放

virtual Mdesk::Boolean DrawImage(McGePoint2d ptLB, McGePoint2d ptLT, McGePoint2d ptRT, McGePoint2d ptRB, Gdiplus::Image*& pImage, const std::vector<McGePoint2d>& vecClipPoint) = NULL;