XML gauge macro

[Bertieb1]

Folks,

 

 

I've just extracted the gauge macro from my favourite aircraft and trying to code the heading select. I want to convert this into a Lua code. I can extract the L:Vars. 

 

 

(L:APhdgSelectBug, degrees) (A:MAGVAR, degrees) 0 (L:headingRefSelect, number) ? + d360 flr (>L:HeadingWindowValue, degrees)

 

 

Anyone had experience with the syntax?

 

 

 

Cheers

Rob