Why are some variables, controls and functions not directly available in some addons ?   A typical example is : "I want to set Autopilot Attitude Hold in my XXX addon, but when I assign a knob of my hardware to the AUTOPILOT ATTITUDE HOLD function in Flight Simulator, it doesn't work in the addon..."  It all about ability to override the simulator data/variable handling. And it really depends on the variables and the simulator. - Sometimes, you can access a var