How to get matching record from another form to display in main form

How to get matching record from another form to display in main form

I have 2 forms;

One main form (Form1), and one form containing static data (Form2)
every time I enter a new record in form1, and physically type in the "postcode", I want the matching "region" pulled in from form2.

Please excuse me if this is easy but I have tried a few ways with no success. BTW I am a new user.

Thanks in advance for any help
Roly