Long ago, yes, years ago, I proposed normalizing the variety of ways of defining (in the preprocessor) version numbers and reflecting the predefined version information. As can be seen here <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?BoostConfig>. Time traveling to the present I have finally put the finishing touches on the end result of this concept as a "Predef" library. It's now grown to include detection of more types of predefs, almost complete documentation with a reference generated directly from the source, and some utilities on adding new predefs. I'm still working on cross-platform testing. But I thought now would be a good time to ask for comments and for people to try it out. The lib is in the sandbox at <http://svn.boost.org/svn/boost/sandbox/predef>. And the docs can be rad directly from <http://svn.boost.org/svn/boost/sandbox/predef/libs/predef/doc/html/index.html>. Enjoy. -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org (msn) - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim,yahoo,skype,efnet,gmail