After a macro has been defined, it can be used anywhere in a description file using the following syntax:

    $(name)

The parentheses are not required if the macro name is only one character long. To use a dollar sign ($) without using a macro, enter two dollar signs ($$), or use the caret (^) before the dollar sign as an escape character.

When NMAKE32 runs, it replaces all occurrences of $(name) with the defined macro string. If the macro is undefined, a null string is substituted. Defined macros can be undefined with the !UNDEF directive.

Example:

To echo the following line to the screen:

    $(HELLO) is HI

The macro must be referenced with double dollar signs ($$), as shown in the following description file excerpt:

     HELLO = HI

     dummy:
          @echo $$(HELLO) is $(HELLO)