已知参数：double x,y;  椭圆的中心坐标
                  double s,l;   分别是椭圆的短轴长和长轴长
                  double theta;  椭圆的倾斜角度
                                double area;   椭圆的面积


请问怎样转换为: 按照windows坐标的椭圆参数x1,y1,x2,y2               
                            CDC::Ellipse(x1,y1,x2,y2)               

[此贴子已经被作者于2005-6-4 21:20:40编辑过]

x1=x-s, y1=y-l, x2=x+s, y2=y+l