require 'gtk'

window = Gtk::Window.new(Gtk::WINDOW_TOPLEVEL)

combo = Gtk::Combo.new
combo.set_popdown_strings(['http://www.netlab.co.jp/ruby/',
			    'http://ruby.freak.ne.jp/'])
combo.entry.set_text ''
window.add(combo)
combo.show
window.show
Gtk.main