>Thanks Sergey.
>
>In the instance of Marcia's grid combobox where the controlsource for the textbox is as follows:
>
>

>(IIF(SEEK(Recordsource.Field,'LookupTable','LookupTag'),LookupTable.Description,''))
>

>
>It's not generating an error but I'm not getting the lookup description to display. So just wondering if my problem was in the seek command or something else?
>

In this case SEEK() is treated as a function because it's a part of expression. My guess is that SEEK() is unsucesssfull. Does size of Recordsource.Field matches LookupTable key field you seek on? What's SET EXACT setting?