我用DrawLine画线，线都很细，不知能否画粗一点的线？谢谢啦

Dim g As Graphics = PictureBox1.CreateGraphics
        Dim p As New Pen(Color.FromArgb(64, Color.Red), 20) ' 20画笔宽度
  g.DrawRectangle(p, New Rectangle(0, 0, 310, 60))
        g.DrawLine(p, 0, 30, 50, 30)