主题：图片管事器的控件类型

请问下，图片管理器的类型是：PictureViewer  这个吧？

我下面这段代码没起到作用 ,帮指正下。

                        If Typeof wc Is winform.PictureViewer
                            MessageBox.show(wc.Name)
                            Dim pv As winform.pictureviewer = wc
                            pv.AddCommand.enabled = False
                            pv.OpenCommand.Enabled= False
                            pv.DeleteCommand.Enabled= False
                            pv.ClearCommand.Enabled= False
                            pv.SaveAsCommand.Enabled= False
                        End If