l</span> <span class="mdzsyn-symbol">btn</span> <span class="mdzsyn-string">"Hello World"</span>))
                         <span class="mdzsyn-constant">nil</span> <span class="mdzsyn-number">1</span>)
  (<span class="mdzsyn-symbol">gtk-container-add</span> <span class="mdzsyn-symbol">window</span> <span class="mdzsyn-symbol">btn</span>)
  (<span class="mdzsyn-symbol">gtk-widget-show-all</span> <span class="mdzsyn-symbol">window</span>))

(<span class="mdzsyn-coresym">defn</span> <span class="mdzsyn-symbol