That's not the way subforms work. Forms/subforms are for one-to-many
relationships. The main form displays the one side and the subform displays
the many side. For example, suppose your database records customers and
their orders. A customer might have many orders so you have a one-to-many
relationship. The tables should look like:
TblCustomer
CustomerID
<fields about a customer such as name and address>
TblOrder
OrderID
CustomerID
<fields abouy an order such as order date and PO#>
The main form would display the data about a customer and the subform would
display a list of that customer's orders. So relating to your question, you
would want an unbound combobox to select a customer and code would take you
to that customer in the main form. When that happens, the subform would
automatically display a list of the orders for the customer you selected.
Steve
(e-mail address removed)