CTree's in a scrolled window - can I "auto-scroll" ?

[Paul Barton-Davis <pbd Op Net>]

i have a CTree packed into a scrolled window. it would be nice if two
things happened:

       1) button motion below and above the scrolled window (i.e.  a
          button press, then leave event, followed by more motion (or
          not, actually) would scroll the visible part of the
          scrolling area

       2) expansion of a tree node would either automatically
          reposition the viewport, or provide some programmatic
	  way for me to do so.

any ideas ?

--p