>It may be available to a user with the proper authorization, but not be available to others. In this case, you shouldn't disable the button for the non-authorized, it should not appear.

Cool thanks. Woudl you say that applies for menu items? If they don't have rights to something, they shoudn't see it at all? My apps are all wrong then. Thats ok, we're cruel to users. A disabled menu item translates too "You don't have rights, nanna nanna boo boo".