Ok, how would I go about figuring out what you mean by "refreshing what's in a output window"?
Use common sense and write your posts so that someone who can't read your mind will still be able to understand what you're talking about.
Say I have a Private Messaging Window, you open it and use it to communicate with another player. I would I go about clearing the messages off of that window?
mob verb Messenger(mob/M in world) set hidden = 1 winshow(src,"PM",1) winshow(M,"PM",1) PM(M as text) src << output("<b>[src.key]</b>:[M]","PMOut")
You can clear an output control (and other controls) by outputting null to it through the output() proc.
(For future reference, 'refreshing' is not 'clearing'.)
Use common sense and write your posts so that someone who can't read your mind will still be able to understand what you're talking about.