Hello, I would like to sub-class the Ruby/Tk iwidget combobox class. I want to be able to post several commands when the "return" key is pressed on the entry of my objects but I also want to preserve the default combobox insertion functionality (new entries are automatically inserted in the scrolled list) The class code could be like ... class MyCombobox << Tk::Iwidgets::Combobox def initialize(parent, *args) super(parent, *args) ... @commands = [] # array of commands @commands << cget(:command) if cget(:command) != "" # the first command launched will be the default command configure :command=>proc {val=get;@commands.each {|c| c.call(val)}} # launch all commands when a new entry ... end attr_reader :commands ... end ... and the usage ... cbb = MyCombobox.new... cbb.commands << proc {|val| puts "new entry #{val}"} The problem is that this code is not working because the default combobox command is a Tcl command (not a ruby proc). So, my questions: - is there a simple (and portable) way to launch Tcl commands from ruby ? - is there a more elegant way to add a list of ruby commands while preserving default Tcl/Tk megawidget functionalities ? - is there any documentation/help on Ruby/Tk and ruby Tk extensions ? (without having to understand the full code) Thanks a lot for your help and regards, Lionel Maiaux