title: A working example for RegOpenCurrentUser
body: <p>Could someone please provide me with an working example with RegOpenCurrentUser?
  All it does for me is give me back ERROR_INVALID_PARAMETER.</p>
  
  <pre><code>PHKEY keyCurrentUser = NULL;
  
  lResult = RegOpenCurrentUser(KEY_READ, keyCurrentUser);
  </code></pre>
  
  <p>lResult is always 87. Don't know why.</p>