TES is [David Gravereaux]'s Windows-specific
Tcl-interpreter-in-C++-application embedding experiment.

He maintains it at http://sourceforge.net/projects/tomasoft/ .

The acronym stands for ''Tcl Event System''.

Read the docs for it @ http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/*checkout*/tomasoft/tes/OSCON2K%2b1_TclTrack.html?rev=1.5