message <span class="message">OpenURLArg</span>
{
  <span class="comment">/** 
   * Start loading the URL in this Window.
   */</span>
  required <span class="number">uint32</span> windowID = 1; 
  <span class="comment">/** 
   * The URL to load.
   */</span>
  required <span class="string">string</span> url      = 2; 
}
