<div class="content" name="RpcOpenEnum" uuid="f17f4b8d-8d52-4538-acf3-cdfbe581a99b"><p>The RpcOpenEnum method returns a <span><a href="c41d3367-04c9-4c93-babf-9b5de834eb29#gt_5044babb-08e3-4bb9-bc12-fe8f542b05ee" data-linktype="relative-path">handle</a></span> of the type <span><a href="15f02d59-200a-435d-a07b-055e1276d01c" data-linktype="relative-path">ENUM_HANDLE</a></span>,
which can be used to query information about the sessions that are currently
running on a <span><a href="c41d3367-04c9-4c93-babf-9b5de834eb29#gt_b416f72e-cf04-4d80-bf93-f5753f3b0998" data-linktype="relative-path">terminal server</a></span>. No
special permissions are required to call this method. However, only sessions to
which the caller has WINSTATION_QUERY permission are enumerated.</p><dl>
<dd>
<div><pre> HRESULT RpcOpenEnum(
   [in] handle_t hBinding,
   [out] ENUM_HANDLE* phEnum
 );
</pre></div>
</dd></dl><p><b>hBinding: </b> The <span><a href="c41d3367-04c9-4c93-babf-9b5de834eb29#gt_8a7f6700-8311-45bc-af10-82e10accd331" data-linktype="relative-path">RPC</a></span> binding handle.
For more information, see <span><a href="https://go.microsoft.com/fwlink/?LinkId=93771" data-linktype="external">[MSDN-RPCBIND]</a></span>.</p><p><b>phEnum: </b> The handle to the session enumeration
object. This is of type ENUM_HANDLE.</p><p><b>Return Values: </b> The method MUST return S_OK
(0x00000000) on success; otherwise, it MUST return an implementation-specific
negative value.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0x00000000 S_OK</td>
  <td>Successful completion.</td>
 </tr></tbody></table>
</dd></dl><p> </p></div>