Ruby/Tk/TkListbox

require "tk"
top = TkRoot.new {title "Label and Entry Widget"}
list1 = TkListbox.new(top)
list1.insert(1," Python")
list1.insert(2," Perl")
list1.insert(3," C")
list1.insert(4," PHP")
list1.insert(5," JSP")
list1.insert(6," Ruby")
list1.pack()
Tk.mainloop