How to do Popup list from Master-Slave tables


I'm looking for an example that shows the best way to do a popup list that allows the user to choose  a detail(slave) record that they can then edit.

I'm writing small program that allows a user to create a manifest in a master table and then the user can add items to the manifest in a detail/slave table.

Is there a recommended way of doing this?  Would you know of a good example that you could refer me to?

Thanks. Any help is greatly appreciated.