Displaying a query in a form and the criteria | Access forum

Hi,
I have designed a database for keeping track of invoices we receive in our finance team.
Information collected included name of supplier, date, amount, invoice number etc
On the form the supplier is selected from a drop down list of over 3000 suppliers we deal with which I have uploaded into seperate table.
When a new invoice is added, and the supplie selected from the drop down list how am I able to show at the side of the form, a summery of all the previous invoices from just that supplier that has been selected?
I assume I need to run a query, however I'm unsure of the criteria so that just that supplier selected on the form is shown.

Cheers,
Jamie