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base.OnPaint(e);
Graphics mygraph = this.button4.CreateGraphics();
mygraph.DrawLine(new Pen(Color.Blue, 5), 167, 12, 290, 12);
mygraph.DrawLine(new Pen(Color.Blue, 5), 167, 12, 220, 63);
mygraph.DrawLine(new Pen(Color.Blue, 5), 290, 12, 232, 63);
private void button3_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawLine(new Pen(Color.Blue, 5), 167, 12, 290, 12);
e.Graphics.DrawLine(new Pen(Color.Blue, 5), 167, 12, 220, 63);
e.Graphics.DrawLine(new Pen(Color.Blue, 5), 290, 12, 232, 63);
}