FSX force feedback API?

Hi everyone,
I'm a programmer with 10+ years of experience in C, C++, C#, embedded, also games etc.

I have a question for people who wrote mods for FSX:
- is it possible to access G-force data / airspeed / acceleration data of an aircraft? is there some API which will allow me to access it?

I want to build a small hardware device that would communicate with FSX in realtime and display some values - how should I approach this?
I would be very grateful if you can point me to any links / documentation etc.
If it's not possible to do - then please also let me know.

Thank you very much in advance.