I use FSX and PMDG 737NGX. I can read the state of the aircraft items using the "Offset Mapping for PMDG 737NGX", but it is read-only, so I can't set any switches.
I been told I can use the "SDK control codes" http://www.blueskies...-control-codes/
and enter them in FSUIPC. It works with assigning them to a joystick button, but I would like to assign them to a IOcards button instead. Is that possible?
I also tried to take the base offset 69632 and added it with 104, but SIOC didn't compile, because 69736 is a too high number.
Var 9003, name seatbelt, Link FSUIPC_INOUT, Offset 69736, Length 1