Midi keyboard to in-game instrument

[Lefinch]

Heya, I'm very unfamiliar with programs that directly input from a midi keyboard to a keyboard input. I do have a bit of limited experience transferring a virtual keyboard into keyboard input using MIRP/Loopmidi and a midi playing program (we have a basic guide here) is it anything like that? It looks very similar from a brief look at midikeys2keys. Maybe there's a way to take what's being output by the keyboard into MIRP instead, or as part of the chain? 

However, I'm definitely not an expert, I just didn't want to leave you hanging either. Hope it gets worked out!