Splitter with only 1 visible pane

Hi all,

Im creating an MDI app. I've created a splitter window in the CMDIFrameWnd derived window. Now in the left pane of the splitter, I place a tree, which workds fine. In the right pane of the splitter, i want there to be... nothing. I want this space to be use for the MDI child windows when they are created.

At the present, ive only got it to work if both panes contain an active view, and when i create new MDI child windows, they disappear behind the main view.

Is there a way of disabling the right pane visualy, and also allowing this area to be used as the parent for all the MDI child windows created ?

Chris