[NTG-context] define command

Hi, For example \define\somemacro[3]{...} gets invoked with \somemacro{#1}{#2}{#3} How do you get rid of those repeating pesky curly brackets and invoke a user defined macro with \somemacro{#1,#2,#3} instead ? :O) -- Best, Alan * TeX engine = LuaTeX * ConTeXt minimals ver: 2008.56.06 19:11 MKIV fmt: 2008.11.10 int: english/english * Ubuntu 8.04 Hardy Heron