One piece of information that I didn't mention is that the characters
are actually coming from a piece of equipment through a keyboard wedge
so there aren't any physical keys being pressed.

I was assuming that the KeyUp wouldn't intrepet the "Shift" correctly
(since it wasn't actually being pressed), but your code does work. I
guess the event looks first at the ASCII it has received and then
assigns the SHIFT value and assigns the keycode based on the ASCII.

It's interesting that when it receives a "<" from the instrument, it
triggers the event twice... once for the ',' and then again for the
virtual shift release.

Thanks for your help.

John