Hi
I am sorry, I think i have not elaborated on my intention.
My intention is to force user to 'enable content' before using the document as this is a macro-embeded document. This document is not a form, it is only a skeleton to help users and users can add in as many sections or graphics as they like. This document will be placed in a sharepoint, user to download this document, complete and send to another user (user 2, user 3 ...) to edit/approve. The use of the document will stop there.

So after user complete and save and close the document, the document should remain as password protected. And when the next user (user2, user 3...) open this file, they will also need to 'enable content' in order to edit the file.

Does this help?