Is there any way to use Processing to transmit keystrokes (preferably limited to certain keys) to a different computer - and then also to recieve keystrokes. This would have to be 4-way, ie. one computer is the 'server', and it, and the other three computers, are running a processing-created .exe file; if one persons hits a key, the effect happens on everyone's computers?

If this is possible, it sould be awesome if someone could give me pointers or example code or something.

Thanks,
Mark