title: opendir error?
body: <p>I get an error with this istruction:</p>
  
  <pre><code>  dp = opendir ("%APPDATA%/.");
  
    output: 
    Couldn't open directory: Mo such file or directory.
  </code></pre>
  
  <p>but I don't get an erro with this istruction:</p>
  
  <pre><code>dp = opendir ("C:/Users/xrobot/AppData/.");
  
  output:
  .
  ..
  Local
  LocalLow
  Roaming
  </code></pre>
  
  <p>Why ?</p>