[.NET] FORM2的PICTUREBOX1繪圖的問題

[lonelymans (AJ)]

假如我在FORM1 作一個按鈕 可以叫出FORM2 然後在PICTURBOX1裡面 繪圖
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim Form2 As New Form2
        Form2.Show()
        Dim g As Graphics
        g = Form2.PictureBox1.CreateGraphics
        g.DrawLine(Pens.Black, 0, 0, 100, 100)

    End Sub
結果執行出來 在form2的picturebox1 畫的線出現一下就不見了
程式碼是哪理出了問題 謝謝

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