Well crap.  Basically what I did was calculate where the character after the
end of text would appear and if the mouse is on that x position or after,
then it's not over the selected text.  This works great for single line
stuff, but obviously can have issues on multi-line stuff if that next
character wraps to the next line.  I'm sure I could come up with some kind
of logic to determine that, but I haven't yet because so far we've just been
worried about single-line richtextboxes.

Lance Johnson