In 4D 2004, you can store the users and the groups of the database created by the Administrator to a BLOB using the USERS TO BLOB command. This command encrypts the generated BLOB which can only be read using the the BLOB TO USERS command. Only the Administrator can execute this command. If a different user tries to execute it, a privilege error (-9949) occurs. Using this command is similar to saving the group and users from the Password menu. The only difference is that the USERS TO BLOB command stores it into a BLOB instead into a file. Consequently, you can store the information in the BLOB also into a file. As shown in example below, the group and users are stored in the BLOB and the BLOB is copied to a file. Through this you can backup the users of your database programmatically.