How to hide or show the Review Pane in word

the Review Pane seems not be in available in Word.WdTaskPanes, so I can not access it by vsto.

I've already seen the ActiveWindow.ActivePane way of closing it but I'd like to refer to the Pane wheter it is active or not.

As a follow-up to your posting. I looked into how to figure out if the Reviewing task pane was open and I believe you will have to check for its split screen type value being open. I used the following code to find that the enumeration of the vertical reviewing split screen is 18.

    ActiveWindow.View.SplitSpecial = 18 'wdPaneRevisionsVert
    Dim i As Integer
    Dim pne As Word.Pane
    For Each pne In ActiveWindow.Panes
        pne.Activate
        Debug.Print ActiveWindow.ActivePane.View.SplitSpecial
    Next