[perl-win32-gui-users] Make textfield selection visible

[sean]

How do you force a textfield selection to be visible within the 
textfield?  I've been reading through the posts on autoscrolling a 
RichEdit, but that makes it scroll down a given number of lines.  I 
want the textfield to scroll only if the selection is not visible, 
and then only enough to make the selection visible.  (I could change 
to a RichEdit if this is not possible with a textfield.)