Claude,
DBV files were the memo format used with Flex File. You might try going to Google. I checked on the Deja News section and a search on "Clipper" and "DBV" got 275 hits.

http://groups.google.com/groups?q=clipper+dbv&hl=en&lr=&safe=off&btnG=Google+Search&site=groups

>Is there anyone who knows Clipper and where to get some information on the DBV_USE() function and a discussion on .dbv files?
>
>Thanks in advance.
>
>Wayne Finch