Private Sub Form1_Paint(ByVal sender As System.Object, ByVal e As _
      System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
        Dim gr As Graphics = e.Graphics
        Dim br As New System.Drawing.Drawing2D.HatchBrush( _
          Drawing2D.HatchStyle.Plaid, Color.Red, Me.BackColor)
        Dim p As New Pen(Color.Black, 1)
        gr.DrawLine(p, 10, 10, 10, 200)
        gr.DrawLine(New Pen(br, 1), 200, 10, 10, 200)
        gr.DrawLine(p, 200, 200, 10, 200)
    End Sub