Private Sub TreeView1_NodeMouseClick(ByVal sender As Object, ByVal e As TreeNodeMouseClickEventArgs) Handles 导航.NodeMouseClick
       Select Case (e.Node.Text)
            Case "出门证"
                Form2.Show()
            Case "借车单"
                Form3.Show()
       End Select
    End Sub

做了个treeview，放在父窗体的离歌panel容器里，左边是treeview，右边是panel2，点击出门证后，FORM2显示在panel2里，能调试，就是提示“尝试读取或写入受保护的内存。这通常指示其他内存已损坏。”form2，标黄，请问这是怎么回事啊？？？