"gthawkster" wrote...
I would like to use a column to identity each row in a list as a separate
item #. I can't have duplicates in this column and would like the program
to prevent someone from entering an ID# in twice. Any ideas?

How exactly is your workbook used by these other users? What sort of ID #s
are they entering? Are your users assigning these ID #s themselves? If so,
computers are MUCH, MUCH BETTER at generating unique ID #s or serial #s than
humans, so it may be better to have the workbook generate these #s.