[NTG-context] get tex-value in lua

Hello, How can I get the value of a variable or a mode in the lua part? Example: context --arguments=MyVar=true test And in test.tex: \starttext \startluacode local my_var = loadstring("return " .. get_value_of("MyVar")) if my_var then tex.print("TRUE") else tex.print("FALSE") end \stopluacode \stoptext TIA for any help! Cheers, Peter -- Contact information: http://pmrb.free.fr/contact/