aramname"><em>propid</em></span>&#160;)</td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel extern">extern</span></span>  </td>
  </tr>
</table>
</div><div class="memdoc">
<p>Returns the number of instances of a property id. Most properties can exist only once. User properties and subscription ids can exist more than once. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">props</td><td>pointer to