Macro Definition Syntax
A macro definition is one or more assembly statements that define: the name of a macro, the format of the macro call, the assembly statements of the macro.
Creating Unique Labels and Equates
Use the backslash and at characters to have the assembler generate unique labels
and equates within a macro.
Referring to the Number of Arguments
To refer to the number of non-null arguments passed to a macro, use the special symbol
narg. You can use this symbol during macro expansion.