<div class="content" name="RpcGetClientData" uuid="7f7d695c-97f8-4b21-9ebf-4580a8dab066"><p>The RpcGetClientData method returns information about the
client that is connected to a particular session 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>. The caller must have WINSTATION_QUERY permission. The method
checks whether the caller has WINSTATION_QUERY permission (section <span><a href="4507e852-be3d-45b6-bc47-8ca0b552c94d" data-linktype="relative-path">3.1.1</a></span>)
by setting it as the Access Request mask, and fails if the caller does not have
the permission. </p><dl>
<dd>
<div><pre> HRESULT RpcGetClientData(
   [in] handle_t hBinding,
   [in] ULONG SessionId,
   [out, size_is(,*pOutBuffByteLen)] 
     unsigned char** ppBuff,
   [out] ULONG* pOutBuffByteLen
 );
</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 <span><a href="c41d3367-04c9-4c93-babf-9b5de834eb29#gt_5044babb-08e3-4bb9-bc12-fe8f542b05ee" data-linktype="relative-path">handle</a></span>.
For more information, see <span><a href="https://go.microsoft.com/fwlink/?LinkId=93771" data-linktype="external">[MSDN-RPCBIND]</a></span>.</p><p><b>SessionId: </b> The ID of the session from which
client data is to be retrieved.</p><p><b>ppBuff: </b> The buffer that contains the client
data. This data is of type <span><a href="673d8ac0-f557-48cb-98a6-49925160d729" data-linktype="relative-path">PWINSTATIONCLIENT</a></span>,
specified in section 2.2.2.19. The buffer is allocated by RpcGetClientData.</p><p><b>pOutBuffByteLen: </b> The number of bytes of
client data that is returned.</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>