Is it possible to navigate to the IRibbonUI object for Excel from the
Application object? I know that I can get addressability to the Ribbon UI
object with on onLoad callback, but saving that in a global variable in VBA
is problematic: If any macro ever encounters an error, VBA clears all the
global variables. I'd like to be able to get back reliably to my customized
part of the Ribbon from my code, later, to do things like enable/disable
buttons, and to "invalidate" it so that it rebuilds the dynamic menus.

For the "old" code I have, using Menus, I've been able to get to the menus
from the CommandBars property of the Application. But I don't see any way to
navigate to the Ribbon stuff. I've searched MSDN and various forums, without
finding an answer.

Thanks in advance for any tips or pointers.
--
Don H.