SHIFTkey horrors

[Mike Bonner]

Another option might be to write an external that does the polling and
dispatches a message when the shift key is pressed, and there might be
other methods of course. Hopefully someone else has a better solution.

Either way, unless rev adds the feature sounds like you may have to bite
the bullet and figure out a less than great method. As far as "on
shiftkeydown" if you do go with the loop method you can of course dispatch
your own messages but this still requires polling so its all a matter of
semantics at that point.