On Monday 04 October 2004 13:42, Jarosław Staniek wrote:
> http://www.iidea.pl/~js/kexi/download/tristate.h

This looks a lot like the boost::tribool class (not yet in boost, but likely 
to be soon). Documentation for that is here:

http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/tribool.html

Richard