Problem with DockingPaneManager.SetCommandBars

I am facing some problem with putting following code into my code.

When I put above code into my coding, the DockingPaneManager_ResizeEvent can only function for the 1st time. How do I know that? Becuz I try to run in debug, I maximize and minimize the form, it doesn't call DockingPaneManager_ResizeEvent to take action. But after I remove DockingPaneManager.SetCommandBars(CommandBars.GetDispatch) from my code, it works fine everytime I maximize or minimize the form. May I know why?

 

I need the DockingPaneManager.SetCommandBars(CommandBars.GetDispatch) to be used in my code to dispatch DockingPane. Please help.

 

Thanks.

 

Private Sub CommandBars_ResizeEvent(ByVal sender As System.Object, ByVal e As System.EventArgs)
        On Error Resume Next

        Dim left As Integer
        Dim top As Integer
        Dim right As Integer
        Dim bottom As Integer
        CommandBars.GetClientRect(left, top, right, bottom)
End Sub

Thansk.