Answer:

First check the Global Defines page (found in api/html/globals_defs.html) which can be reached by clicking on the "File Members" link from main.html and then the "Defines" link in the top right-hand corner beneath the ALMA Computing Group logo.

If it's not listed here, there is actually a chance it was not generated at all. You see unlike C++ classes and functions, define macros are only automatically documented if there is a tag located directly above the define. For example, Doxygen would create inline doc for:

/**
 * Any documentation here is sufficient
 */
#define ONE 1

but would not generate anything for:

#define ONE 1

ACS makes every effort to ensure that all macros to be used from ALMA developer code are nicely documented, but some may fall through the cracks. If you encounter such a macro, please report this to the acs-discuss@nrao.edu mailing list.

For further information on the use of Doxygen, please consult the Doxygen tutorial itself: http://www.stack.nl/~dimitri/doxygen/download.html#latestman

-- DavidFugate - 10 Jan 2005