DСS bios - P51D need help with sketch

[Vuacheslav]

Guys, I ask for help in writing a sketch for a speed indicator in a Mustang P51D. I can't figure out how to write it.

Photo of used equipment. Here are the parameters that the HUB offers

 void onAirspeedMphValueChange(unsigned int newValue) {
    /* your code here */
}
DcsBios::IntegerBuffer airspeedMphValueBuffer(0x5098, 0xffff, 0, onAirspeedMphValueChange);

what should i do with it?