VC++ CDC::Arc 汉化参数明说及举例
BOOL Arc( int x1, inty1, int x2, int y2, intx3, int y3, int x4, inty4 );BOOL Arc( LPCRECT lpRect, POINT ptStart, POINT ptEnd );x1为有效矩形左上角X坐标点.y1为有效矩形左上角y坐标点.x2为有效矩形右下角x坐标点.y2为有效矩形右下角y坐标点.