You must activated the wizard for listboxes. For more information follow the links.
There are two sub forums for Base one for Tutorials
and one for examples
you can find there a lot of informationMore to read
I think a good starting point can maybe this [Tutorial] Forms in OpenOffice.org Base
. You can find there also links to other tutorials. Not all tutorials are even important for you
This tutorial of Arineckaig
describes what you can do with the Navigation toolbar and with the navigation control.