如何实现点击线路按钮实现画折线？
鼠标每次单击都保存当前x,y，然后每个保存的x,y调用
drawline
,如 ：// Create pen.Pen blackPen = new Pen(Color.Black, 3);// Create coordinates of points that define line.int x1 = 100;int y1 = 100;int x2 = 500;int y2 = 100;// Draw line to screen.e.Graphics.DrawLine(blackPen, x1, y1, x2, y2);
