building a invoicing database

[mattyj]

I am new at building filemaker databases. I am trying to build an invoicing database for my work. I want to be able to go to the invoice to fill it out and enter a product code in 1 feild and have the discription show up in the next feild automaticly. Any Ideas?

Is there any free downloads of products like this that I could have a look at. I don't mind deconstructing another database to learn how it works.

Thanks!

[comment]

See if this helps:

http://fmforums.com/forum/showpost.php?post/309136/