画一个矩形如下:
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim gp As Graphics = e.Graphics
Dim newpen As New Pen(Color.Black, 5)
gp.DrawRectangle(newpen, 10, 20, 70, 80)
End Sub
画正方形要求最后两个参数相同:
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim gp As Graphics = e.Graphics
Dim
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