"connect" two windows

Hi again!

I've another question.. Is it somewhat possible to "connect" two windows 
in different frames (are they called frames btw?) .
To make it a little clearer let's assume I have an instant messenger and 
the buddy list is in one frame, the actual conversation in another.. If 
I now switch to the messanger's buddy list in the first frame, I would 
like the conversation to appear automatically in the second frame.


Thank you

--
Pascal