Simulation Variable for the VNAV autopilot mode

Does anybody know what’s the correct Simulation Variable for this? I’ve looked through the docs for hours, tried a bunch of vaguely related variables (like glidesclope/gps ones), nothing in the autopilot section seems like an exact fit. I am clueless, it seems to me like perhaps it doesn’t exist at all.

You mean to invoke it as a player interaction? I believe it actually varies by FMS and potentially by aircraft. There are LVARs on Hubhop (Mobiflight Library) that vary by sim, FMS and aircraft.

This is the LVAR for the Working Title/Asobo Vision Jet in 2024:

(L:XMLVAR_VNAVButtonValue) ! (>L:XMLVAR_VNAVButtonValue)

A long time ago I requested via Wishlist a standard keybind for VNAV (much like you could for LNAV modes) but nothing came of it.

I’ve just started last week with SimConnect so I’m very green with this. I haven’t read the RPN section yet, and thought that the SimVar section were the only variables accessible. I also managed to find more bespoke variables with the “Behaviors” tool from the developer mode.