Tues Jan 27

 * Questions and comments on progress so far.

 * Your choice of Perl/Tk or Java/Swing,
   if the perl adoption isn't working.
   
 * A bit more on perl references and objects
   See jan27_code.pl

 * Discussion of event driven programming :
    * objects
    * API
    * view hierarchy
    * event hierarchy and callback routines
    * main loop is in their code, not yours.

 * /code/perl/Tk/helloWorld.pl
   /usr/bin/widget
   /code/perl/Tk/red_blue.pl