title: how to write programs using advanced OpenType features?
body: <p>How could I write a simple program using OpenType tables in order to dynamically render text? </p>
  
  <p>please answer in :</p>
  
  <ul>
  <li>assembly , C , C++ , C# , java or Python (and a little WPF:-) </li>
  </ul>
  
  <p>or introduce libraries of them.</p>
  
  <p>comments and answers about text rendering system of common Operating Systems, or designing text engines compatible with unicode 5.02 protocol are welcomed.</p>