Editable User Table

Hi, I'm creating an Add-on. When I create a user table, this table will be modified from the Tool -> User Defined Windows. I have the option of create them outside SAP BO, but the problem is that I can't create

UDO's later.How I can create tables that can't been modify by the users?

Edited by: Martin Reyes on Jun 3, 2009 12:22 AM