I am new to ruby, so I need some help. I want to use tk widgets when I teach ruby. I have downloaded and installed the ruby-1.8.6-p110 distribution. When I tried to do the "Hello World" window in ruby/tk, irb could not find tk. I can find the tk directory which is at: /home/fred/Desktop/ruby/ruby-1.8.6-p110/ext/tk Is there a shell variable I need to set that contains where tk is? I couldn't find much help on google. Thanks in advance john slimick slimick@pitt.edu