I am working on a validation rule. I can't figure out what expression to use. I have a form where you type in an item number and all the details for that item pop up into their respective fields. When an item number that is typed in that does not appear in the database, I'd like to have a validation rule pop up saying that number is not in the database. What expression should I use?
The item number field is a combo box that draws from the item number table.
Thanks for any help!!!
The item number field is a combo box that draws from the item number table.
Thanks for any help!!!