Trying to store a reference to a record's ID in another table

Trying to store a reference to a record's ID in another table

Hi all,

I'd like to get the ID of a record in one table and store it in another for cross referencing. Trouble is, the ID is a bigint and I can't seem to store this large number in a form field because of size limits. I've tried all sorts of tricks but have run out of ideas. Any suggestions?

Steve