I have my toolbars set up the way I like them, and the Reviewing toolbar
is not part of them. However, often when I open up excel files from
other people, the Reviewing toolbar pops up. I had created an addin
with an application event trapper that would trap the OnWorkbookOpen
event and make the reviewing toolbar.visible=false. This works, but
there is a problem with it; whenever I am debugging something and it
breaks, the add-in is no longer able to trap the application level
events. I do not know why, so I cannot fix it.

Is there any other way to ensure that a toolbar never popups? If no one
can think of a way, I will probably end up writing a VB6 dll to do it -
they do not suddenly break because i am debugging in VBA. Any help
would be appreciated.