Possible Duplicate:
Hiding a sheet in Excel 2007 (with a password) OR hide VBA code in Excel
I have set of excel sheets with macros. Now i want to hide the tabs like Review and Developer so that users can't do modifications to the code. I know that File->Options->Customize Ribbon->Select Tab->Enable\Disable->Click Ok hides the tabs but any user can unhide the tabs with the same process. So i want an alternative way to restrict users to unhide Tabs which are hidden.