It wouldn't require more than 3 bools (or a 3-bit number) being sent with the keys, and has been available for a very long time, even on "old school" platforms. Basically, it'd let you easily know if the user hit Esc or Ctrl-Esc or Alt-Shift-Esc, which we can't do currently.
Any ideas on this? There's already stuff like Gopher's "ctrlkeys", but it's a hack and it shows. It does its best, but it seems like something that could be implemented directly into the mod and save everyone a lot of hassle.












