大家好!!我是一新手!!請大家多多關照!我在窗體上畫了一個多邊形,想確定在鼠標點擊窗體的時候,鼠標點擊的那點是否在所畫的多邊形內,這個要怎么做啊!!請大家多多幫忙!! Graphics g = this.CreateGraphics();            Pen p = new Pen(Color.Red);            Point p1 = new Point(5,285);            Point p2 = new Point(269,183);            Point p3 = new Point(398,292);            Point p4 = new Point(815,362);            Point p5 = new Point(814,578);            Point p6 = new Point(261,578);            Point p7 = new Point(2,404);            Point[] pa ={ p1, p2, p3, p4, p5, p6, p7 };            g.DrawPolygon(p,pa);