require 'gtk'

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

vadj = Gtk::Adjustment.new(0,0,0,0,0,0)
text = Gtk::Text.new(nil, vadj)
vs = Gtk::VScrollbar.new(vadj)

text.set_editable true

hbox = Gtk::HBox.new(false, 0)
hbox.pack_start text, true, true, 0
hbox.pack_start vs, false, false, 0

window.add hbox
text.show
vs.show
hbox.show
window.show
Gtk.main