添加窗体圆角

[c#]代码库

  protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
         GraphicsPath oPath = new GraphicsPath();
         int x = 0;
         int y = 0;
         int w = Width;
         int h = Height;
         int a = 5;
         Graphics g = CreateGraphics();
         oPath.AddArc(x, y, a, a, 180, 90);
         oPath.AddArc(w - a, y, a, a, 270, 90);
         oPath.AddArc(w - a / 2, h - a / 2, a / 2, a / 2, 0, 90);
         oPath.AddArc(x, h - a, a, a, 90, 90);
         oPath.CloseAllFigures();
         Region = new Region(oPath);
        }