这样为何画不出图
Dim myPen As New Pen(Color.Black, 5)
Dim g As Graphics = Me.CreateGraphics
g.DrawEllipse(myPen, 20, 30, 10, 50)
Dim myPen As New Pen(Color.Black, 5)
Dim g As Graphics = Me.CreateGraphics
g.DrawEllipse(myPen, 20, 30, 10, 50)