[FlashCodersNY] Container size of masked content

[Tristan Smith]

Hello!

I am racking my mind, and burning up Google trying to figure this out:

How do you dynamically determine the actual viewable size of a movieclip 
containing a masked object??
The bounding area of a container always reflects all of its content, 
whether it is masked out or not.  This is a problem if I want to scroll 
the content of a movieclip that has a masked image in it, since it 
reports the content as much taller or wider than is actually visible.

If anyone has a good suggestion, I would be very grateful!  Thanks...
~  Tristan