Hi ZaiZai,
I am not sure if you have security issues with your work. as Skarn said.
I have been posting a similar complaints for a while, without fully testing the Customize function.
But I experimented with the customize function, as well as enabling the Protection.
What I have found so far is if you remove the customise and toolbar menu commands plus lots of other sensitive commands,
YOU can achieve results.
The form is then relatively protected.
It can be found in the Tools menu command, and in View/Toolbars.
Once you conduct these changes, I do not know if you can unhide the commnads.
I am still looking for a reversal.
Depends on how cluey the user is I guess.
Or, if they seek help from a "guru", they may find a way in to modify the code.
I guess that is the best we can do. I am still investigation Microsoft Information Rights Management.
Can anyone provide further, and maybe better information regarding this?