What is FLC button and light called in presets?

[tranquil gull]

What is FLC button and light called in presets?

[elder meteor]

most likely FLC, Level Change or Flight Level Change. Which aircraft are you creating a config for?

[tranquil gull]

i want to code for generic if possible so it would work for most aircraft

[queen brook]

Like TheEgg52 said.
I looked by searching for FLC and choosing generic on Aircraft lists and found both, input and output

[tranquil gull]

am I doing something wrong?

[queen brook]

oooh sorry, I thought we are in MSFS channel

I don't knoiw about Xplane

[elder meteor]

The generic command is sim/autopilot/level_change it currently isn't in hubhop I'll test when I'm back at my pc in a few hours and make sure it works with mobiflight

[gray salmon]

This request is dead in the water unless you tell us which aircraft you're using.

Every aircraft may implement their own commands for FLC functionality

[tranquil gull]

as an example can be 172, 208b

[elder meteor]

just tested in the default 172 g1000 and the command for flc is sim/autopilot/level_change and when active dataref sim/cockpit2/autopilot/speed_status will have a value of 2

both are in hubhop under generic aircraft