一、这是一个绘制圆角窗体的静态类：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows.Forms;using System.Drawing;using System.Drawing.Drawing2D;namespace WindowsFormsApplication2{    public static class RoundFormDraw    {        public static void Paint(this object sender, PaintEventArgs e)        {            Form form = ((Form)sender);            List
     
       list = new List
      
       ();            int width = form.Width;            int height = form.Height;            //左上            list.Add(new Point(0, 5));            list.Add(new Point(1, 5));            list.Add(new Point(1, 3));            list.Add(new Point(2, 3));            list.Add(new Point(2, 2));            list.Add(new Point(3, 2));            list.Add(new Point(3, 1));            list.Add(new Point(5, 1));            list.Add(new Point(5, 0));            //右上            list.Add(new Point(width - 5, 0));            list.Add(new Point(width - 5, 1));            list.Add(new Point(width - 3, 1));            list.Add(new Point(width - 3, 2));            list.Add(new Point(width - 2, 2));            list.Add(new Point(width - 2, 3));            list.Add(new Point(width - 1, 3));            list.Add(new Point(width - 1, 5));            list.Add(new Point(width - 0, 5));            //右下            list.Add(new Point(width - 0, height - 5));            list.Add(new Point(width - 1, height - 5));            list.Add(new Point(width - 1, height - 3));            list.Add(new Point(width - 2, height - 3));            list.Add(new Point(width - 2, height - 2));            list.Add(new Point(width - 3, height - 2));            list.Add(new Point(width - 3, height - 1));            list.Add(new Point(width - 5, height - 1));            list.Add(new Point(width - 5, height - 0));            //左下            list.Add(new Point(5, height - 0));            list.Add(new Point(5, height - 1));            list.Add(new Point(3, height - 1));            list.Add(new Point(3, height - 2));            list.Add(new Point(2, height - 2));            list.Add(new Point(2, height - 3));            list.Add(new Point(1, height - 3));            list.Add(new Point(1, height - 5));            list.Add(new Point(0, height - 5));            Point[] points = list.ToArray();            GraphicsPath shape = new GraphicsPath();            shape.AddPolygon(points);            //将窗体的显示区域设为GraphicsPath的实例             form.Region = new System.Drawing.Region(shape);        }    }}
      
     

 

二、使用方法：

1.将窗体的FormBorderStyle属性设置为none

2.在窗体的Paint事件中添加如下代码

RoundFormDraw.Paint(sender,e);

RoundFormDraw就是上面的类