You will at least need a connection:
[tt]Rec.Open "SELECT JN from Projects Where JN ='" & Job & "'", _
currentproject.connection[/tt]
Which should give you a readonly, forwardonly recordset.
Check the help files on the open method, the appropriate cursor and locktype, and/or search these fora, there are lot of threads containing methods of opening recordsets.
Also perhaps have a look at faq181-2886 on how to get the most out of the membership. This is the query and sql forum, the question might perhaps be better addressed in forum705 (Access VBA)
Roy-Vidar