how to use UpdateuBuilder

Is there any code snippet/example on how to use UpdateBuilder? I am running
the UpdateCommand and would want to know the following:
1. list of files not in repository
2. list of files that got changed.
3. Files added

I have implemented the CVSAdapter and know that I can get the items 2/3 from
it. But how would I get the item 1? Looking at UpdateBuilder leads me to
believe that if I pass in a builder I can get all these information. But I
am not sure how to do it.

Thanks,
Shantanu Sen