private void BeautiLoginForm_Paint(object sender, PaintEventArgs e)
  {
   Type(this, 25, 0.1);
  }
  private void Type(Control sender, int p_1, double p_2)
  {
   GraphicsPath oPath = new GraphicsPath();
   oPath.AddClosedCurve(new Point[] {
    new Point(0, sender.Height / p_1),
    new Point(sender.Width / p_1, 0),
    new Point(sender.Width - sender.Width / p_1, 0),
    new Point(sender.Width, sender.Height / p_1),
    new Point(sender.Width, sender.Height - sender.Height / p_1),
    new Point(sender.Width - sender.Width / p_1, sender.Height),
    new Point(sender.Width / p_1, sender.Height),
    new Point(0, sender.Height - sender.Height / p_1) }, (float)p_2);
   sender.Region = new Region(oPath);
  }

  private void BeautiLoginForm_Resize(object sender, EventArgs e)
  {
   Type(this, 25, 0.1);
  }