Dave
I assume you mean something like what happens when you use one of the "new"
wizards (e.g., new query).
The concept behind the appearance is that you have two sources of data. The
source for the list in the first list is either all available items or, to
be fancier, all available items that are NOT chosen. The source for the
second (your "adjacent") list is a query that finds only the chosen items.
Since whatever your "main form" underlying record is can have zero, one or
many chosen items, you are probably better off using a table to hold
MainTableID plus ChosenItemID.
To get an item into the chosen list/table, you add code behind the
form/event to add the item selected in the first box to the underlying table
of the second box, then requery the second box. If you are using the
fancier version of the first box, you requery it also, to "remove" the
chosen item.
I couldn't tell from your post -- is this what you were looking for?
--
Regards
Jeff Boyce
Microsoft Office/Access MVP
Microsoft IT Academy Program Mentor
http://microsoftitacademy.com/
Microsoft Registered Partner
https://partner.microsoft.com/