title: What do these window.external calls mean?
body: <p>I recently came across a JavaScript file in our source tree with lots of calls like</p>
  
  <pre><code>window.external.getParameter()
  window.external.createGUID()
  window.external.readStringFromRegistry()
  </code></pre>
  
  <p>and so on and I'm really confused about it.</p>
  
  <p>Are these somehow native calls to the Windows API? And where can I find more information about all the available <code>window.external</code> namespace functions?</p>