I created the following behind a field in a form DLookUp("[CMSRPhoneNumber]","[tbl:CM Sales Rep]","[CMSRName]='" & [frm:Main Table].[Combo134] & "'"). I have a table that contains two fields, Name and Phone Number. On a form, I have a combo box with a persons name listed from this table. I want to automatically populate the phone number into another field on this form. I can get the Dlookup to work in a Query but it will not work on the form. I put the expression in the BeforeUpdate section of the field. HELP!