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e.Graphics.Clear(pnl.BackColor);
Rectangle Rtg_LT = new Rectangle();
Rectangle Rtg_RT = new Rectangle();
Rectangle Rtg_LB = new Rectangle();
Rectangle Rtg_RB = new Rectangle();
Rtg_LT.X = 0; Rtg_LT.Y = 7; Rtg_LT.Width = 10; Rtg_LT.Height = 10;
Rtg_RT.X = e.ClipRectangle.Width - 11; Rtg_RT.Y = 7; Rtg_RT.Width = 10; Rtg_RT.Height = 10;
Rtg_LB.X = 0; Rtg_LB.Y = e.ClipRectangle.Height - 11; Rtg_LB.Width = 10; Rtg_LB.Height = 10;
Rtg_RB.X = e.ClipRectangle.Width - 11; Rtg_RB.Y = e.ClipRectangle.Height - 11; Rtg_RB.Width = 10; Rtg_RB.Height = 10;
Color color = Color.FromArgb(51, 94, 168);
Pen Pen_AL = new Pen(color, 1);
Pen_AL.Color = color;
Brush brush = new HatchBrush(HatchStyle.Divot, color);
e.Graphics.DrawString(pnl.Text, pnl.Font, brush, 6, 0);
e.Graphics.DrawArc(Pen_AL, Rtg_LT, 180, 90);
e.Graphics.DrawArc(Pen_AL, Rtg_RT, 270, 90);
e.Graphics.DrawArc(Pen_AL, Rtg_LB, 90, 90);
e.Graphics.DrawArc(Pen_AL, Rtg_RB, 0, 90);
e.Graphics.DrawLine(Pen_AL, 5, 7, 6, 7);
e.Graphics.DrawLine(Pen_AL, e.Graphics.MeasureString(pnl.Text, pnl.Font).Width + 3, 7, e.ClipRectangle.Width - 7, 7);
e.Graphics.DrawLine(Pen_AL, 0, 13, 0, e.ClipRectangle.Height - 7);
e.Graphics.DrawLine(Pen_AL, 6, e.ClipRectangle.Height - 1, e.ClipRectangle.Width - 7, e.ClipRectangle.Height - 1);
e.Graphics.DrawLine(Pen_AL, e.ClipRectangle.Width - 1, e.ClipRectangle.Height - 7, e.ClipRectangle.Width - 1, 13);