Switches

Hello !
I'd like to create some switch to my new project.I read the FS2004 SDK but I did not find some parameters and events :
Main switch on/off toggle (Not battery)
COM radio on/off toggle
Converter (?) on/off toggle
What parameters can I use for these?
I'd like to create some switch to my new project.I read the FS2004 SDK but I did not find some parameters and events :
Main switch on/off toggle (Not battery)
COM radio on/off toggle
Converter (?) on/off toggle
What parameters can I use for these?