I'm using Excel as my database. User access to the Excel database by using another Excel I've created using macro. Basically it means, I have one database called (CFS_database.xls) and another main screen to access to the CFS_database (called "Main.xls").

When user edit the database through Main.xls, it will open the CFS_database and do all the editing by using the form I've created. These 2 excel files are share among users.

Even though they have full access to the file, how can I prevent them from copying CFS_database to their own pc by using macro VBA?

PLEASE HELP...