It would be 2 different strings really, so something like
For Field 1 =LEFT(13),DLookUp("Caption","PLUCaption","Code='1318'")
For Field 1 =RIGHT(13),DLookUp("Caption","PLUCaption","Code='1318'")
If it helps I have 1 field (always 26 characters) which says "Pint of Lager ", I want...