自动绘制窗体圆角

#region 重绘窗体为圆角
private void DispenserForm_Paint(object sender, PaintEventArgs e)
{
Form form = ((Form)sender);
List<Point> list = new List<Point>();
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);
}
#endregion