Macro Definition Section
The macro definition section is bounded by BEGIN_MACROS and END_MACROS statements and consists of lines with the following syntax.
macro_name EQU control_character_list
The macro name can be any alphanumeric string that does not contain spaces, and the control character list consists of one or more two-digit hexadecimal values representing the data to be sent to the printer.
For example, the following macro defines the NUL character.
NUL EQU 00
For an example macro definition, see Sample Source Text File.