[NTG-context] Does \Level2Command work?

Hi, in one of Luigi's "Grid-keeping table"-mail I saw the term "\setbox100". I didn't try that code, don't know what it means. But it gave me the idea: is it actually possible to use numbers in defining command's names? Something like this ... \setuphead[Level2] [header=empty,page=yes,numbercommand=\Level2Command,align=middle,alternative=paragraph,style=\Level2Style,before={\strut\blank[42pt]},after={\blank[12pt]}] \setuphead[Level3] [header=empty,page=yes,numbercommand=\Level3Command,align=middle,alternative=paragraph,style=\Level3Style,before={\strut\blank[42pt]},after={\blank[12pt]}] ... looks much clearer than using the numbers written out in letters. Steffen