Michael,

> Can I list the roles thats been created on a FB Server ?

Roles are database specific and not server-wide like
FB users.

> I have InterbaseExpress comp. installed.

don't know if there is an IBX-way, but the following
query works always.

select rdb$role_name from rdb$roles order by 1


Regards,
Thomas Steinmaurer
http://www.iblogmanager.com

See you at the First European Firebird Conference in May in Fulda, Germany
http://www.firebird-conference.com