Tie::Watch An object oriented interface to the Perl builtin tie(), that allows a watchpoint to be placed on any Perl variable. A watchpoint is simply a callback (subroutine) that is invoked when a variable is accessed. The callback can do various things: . alter a variable's value . prevent a variable's value from being changed . invoke a Perl/Tk callback when a variable changes . trace references to a variable Do: perl Makefile.PL make test make install If you have Tk installed, delete the __END__ statement from test.pl and execute "test.pl all" to see a Tk watchpoint example. BUGS: tied arrays are incomplete, thus so are watched arrays. Steve Lidie lusol@Lehigh.EDU 97/10/03