主题：如何在panel画点划线边框

Dim g As Graphics = e.Form.Controls("panel1").BaseControl.CreateGraphics
'g.Clear(Color.red)
Dim mpen As New Pen(Color.Red)
Dim p1 As Point = New Point(10, 80)
Dim p2 As Point = New Point(10, 160)
g.DrawLine(mpen, p1, p2)

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