unbound combobox -- controlling what is selected

[Garret]

I am using an unbound control box and the onchange event to set the value of
a bound field (CustID). The control box has three columns: CustID, Company,
Contact. The CustID is hidden. CustID has a Parent/Child relationship with a
subform that display a bunch of info.

I would like to have the control box display the value of CustID as a use
scroll through each record with the navigation buttons.

Any Ideas how to do this?
Thanks