标题：动态增加treeview控件怎么加啊！

        Dim tr As WinForm.treeview
        tr=e.Form.CreateControl("treeview" ,ControlTypeEnum.treeview)
        tr.setbounds(10,10,100,100)
        tr.Topmost=True

       e.Form.AddControl(tr)
上面代码报错了！