Using the Move method of the CommandBar object I managed to move a CommandBarControl using the following syntax:
CommandBars("TopMenu").Controls("SomeControl").Move CommandBars("AnotherTopMenu")
I need, however, to move the control to a submenu (or popup menu) within a CommandBar and cannot find a way of doing it, as the first argument of the Move method will only accept a CommandBar object
I subsequently found the answer here.
In a nutshell you need to use the
CommandBarproperty of the popupmenu control.