#! /usr/local/bin/gtkdialog -f
<vbox>
  <checkbox>
    <label>This is a checkbox</label>
    <variable>CHECK1</variable>
  </checkbox>
  <checkbox>
    <label>Another one</label>
    <variable>CHECK2</variable>
  </checkbox>
  <button>
    <label>OK</label>
  </button>
</vbox>