The following is a simple technique on how to disable users from clicking on any of the MSAccess Menu items.
I use this technique to control what users can/cannot click on.
It basically involves opening a 'background' form, maximizing it, and then opening a popup/modal type form after that.
Notice in the example that you cannot click on any of the MSAccess menu items. You can thus control the flow of how user's open forms and what they can/cannot click on by designing popup/modal type forms.
Simple but effective.