>Yes. Thanks for your reply Sergey!
>I have marked this field with sys+bin using the cmrepair.app aplication to securely store the user's license information, how the number of the computers licensed to use the aplication and other informations regard on license information.

It's quite poor protection because the table can be opened in any text editor for viewing and edited using hex editor. Check download section for classes/programs that allow to encrypt data.