Combobox connecting to table in database

[pettachi]

Hi,

 

I have 2 tables in a database Customers and villages who are related with a village-id.

I have created a form to add customers, but i want that you can klik the village from a combobox , but when he adds the customer to the database, he must save the village-id.

 

Does someone know how i must configure the combobox?

 

Greetz