Hiding X windows

[dirk dierickx]

All,

I'm looking for a way to hide opened windows in X, these windows can be
using any widget-set so it will not target gtk, qt, motif, etc directly
(I know how to do it in gtk for example, but this will only work for gtk
apps ofcourse).

Just an easy way to select a certain window and hide it, is anything like
this possible?

thanks,
-- 
Don't let your mind wander -- it's too little to be let out alone.