NSView begin scrolled

FROM : Alexander Cohen
DATE : Wed Nov 07 17:17:23 2007

How can i set up a NSView to be notified when its being scrolled? I 
tried getting notifications for bounds and frame changes on the view, 
but i dont get any when it is scrolled. I also tried overeloading 
setFrame and setBounds, but the same thing, no updates when being 
scrolled.

Any ideas?

thanks

AC