I have a box that is bound to column 1 of a combo box called "PONumber", it opens the name of the vendor and automatically fills it in when a PO number is selected. Now some PO's are not in the system and need to be given a vendor name when a referencing PONumber doesn't exist. What I have right now is something like <br>=IIf(IsNull([ponum].[Column](1)),"",[ponum].[Column](1))<br>so if a ponumber exists it'll use column one and if not, nothing will happen. How can I change that "" to something that will allow me to enter a vendor in the field. So I need a command that changes it to a Unbound control.<br><br>thanks in advance.