How to query unanswered posts from more than one forum?
 

Hi all i know how to get all unanswered posts from all forums or a single forum but how do i get them from a specific forum (closed for posting) and it's children?

This is how to get from a single forum:
href="http://www.thecodecage.com/forumz/se...ss&forumchoice[]=64&childforums=0&replyless=1&replylimit=0&nocache =0" target="_parent" title="All Excel forum threads"

I want to get all unanswered posts from forum id 64 and its children.