Event upon Releasing a Key? Is this possible?

Or give me the .001 file.

I don't see anything called ControlX, although there is ActiveX.

You may need to download Control X using the Extension Manager, but Active X is not what you need.

Slight problem though. I'm working from school, the school system is only accessible through a private Citrix network, and said network runs regular scans to make sure nobody downloads anything.

There may be alternatives, but I'm unaware of them. Unless someone is aware of a way without need for downloading an alternate extension, this is your best bet.