Hi,
There are 2 ways to do it.
1. You make an online backup with "probkup online <db> <db>.bk" and make sure that the <db>.bk file will be backed up with Veritas.
2. You shutdown your database with "proshut <db> -by" and backup all the progress database files *.db *.lg *.d<n> *.b<n> *.a<n> with veritas.
The advantage of number 1 is that you can make online backups and all the data is preserved, however you need enough diskspace to store the backup.
Regards,
John