Ruby 使用 TkEntry

require 'tk'
top = TkRoot.new {title "Label and Entry Widget"}
lb1=TkLabel.new(top){
      text 'Hello World'
      background "yellow"
      foreground "blue"
      pack('padx'=>10, 'pady'=>10, 'side'=>'left')
}
e1 = TkEntry.new(top){
      background "red"
      foreground "blue"
      pack('padx'=>10, 'pady'=>10, 'side'=>'left')
}
Tk.mainloop