I have created an application where each pane contains a frame window with a toolbar in it (as in the Advanced demo), but I have derived the embedded frame window from CXTPFrameWndBase and instead of a normal toolbar my panes have a CXTPToolbar. 

This all works fine and I can customise the toolbar when a pane is docked but when it is floating I get a problem.  Customising the toolbar appears to work fine until you close the property sheet, at that point the entire application freezes and stops responding to mouse or keyboard events.

I've had a look at the CXTPCustomizeSheet::DoModal() function, and it does hook into mouse and keyboard events while customising, but releases them before returning.  I can't see where the problem is, can anyone help?

Thanks.