I would like a button that opens the pdf file.
This might get you started.
http://www.mvps.org/access/api/api0018.htm
Just use:
Application.FollowHyperlink "c:\goods\drawings\help.pdf"
--
Albert D. Kallal (Access MVP)
Edmonton, Alberta Canada
pleaseNOO...@msn.com
OP is looking for a technique using a formula. Something like this would do:
BaseDir ="c:\docs\PDF\"
FileName ="fred"
Application.FollowHyperlink BaseDir & Filename & ".pdf"
In a real application FileName would probably have a value retrieved
from the database.