defstring – Define macros as verbatim macros
The command \defstring defines its first argument (a control sequence name) as the content of its second argument, with category code ‘other’, with surrounding braces added.
Maybe you are interested in the following packages as well.
- getoptk: Define macros with sophisticated options
- default: Provide default parameters for TeX macros
- xoptarg: Expandable macros that take an optional argument
- automagic: Automagic numbering in Plain TeX