This sounds like you you want to "take over" Excel so only your toolbar/menus
are used while the project is open. If so then...

You need to store a list of all the commandbars you want to hide, then
iterate the list to restore them before close. If you could just do the
visible bars then that's a simple task. If you need to restrict user access
to other commandbars then you need to "disable" the various paths one could
take to get at them. This is probably better than having to iterate the
commandbars collection for every bar, which could take fairly long. If
something goes wrong in the process, ..then what?

Your code sample disables all of them, which suggests your project provides
all the menus, popups, etc that it uses. That's admirable, but it has its
challenges in making it all happen smoothly, and without any hitches.

In any case, you need a workspace management strategy for handling this,
-something like 'StoreSettings()' for starting up and 'RestoreSettings()' for
shutting down. Just call them appropriately from code in "ThisWorkbook". This
will, at the very least, give you a start for what changes you make and how
they need to be restored.

If the settings are only for the current session, I suggest using a hidden
sheet to store the info would be the easiest way. A simple format would be to
list the settings you want to manipulate in column1 of a 3-column range. In
the other two, use one for existing settings and the other for your settings.
Then write code to step through the list on startup, that collects and writes
the values. Then go through it to read and apply your values. This leaves one
more iteration on close to read and restore the original settings.

Have another area(s) on the sheet to store the commandbar names, and their
respective values. I would put them in separate lists according to the
setting. (.Visible list, .Enabled list...) That way you can process them more
easily in your code, ..if not more organized. This could be a single cell for
each list, containing the names separated by commas, named BarsVisible,
BarsEnabled, and so on. (just a suggestion using the setting in the name)

If you need some good reference material for this, here's some books that
are worth more than their weight in gold:

Excel xxxx Power Programming with VBA by John Walkenbach is a good one to
start with.

Excel xxxx VBA: Programmer's Reference by Stephen Bullen, Rob Bovey, John
Green, et al (If you still aren't full)
and by the same authors...
Professional Excel Development (if you're really looking to "get into it")

Amazon.com has them all. Good luck!
GS