1#!/usr/bin/env ruby 2require 'tk' 3require 'tkextlib/iwidgets' 4 5om = Tk::Iwidgets::Optionmenu.new(:labelmargin=>5, :labelpos=>:w, 6 :labeltext=>"Operating System :") 7 8om.insert('end', 'Unix', 'VMS', 'Linux', 'OS/2', 'Windows NT', 'DOS') 9om.sort_ascending 10om.select('Linux') 11 12om.pack(:padx=>10, :pady=>10) 13 14Tk.mainloop 15