<div class="content"><p> </p><p>The <b>FAX_EnumPorts (Opnum 10)</b> method is called by the
client to obtain port state information.</p><p>In response, the server MUST validate whether the client&#39;s
fax user account has access to enumerate all the devices (ports) on the server.
On success, the server MUST return information about all its devices in <i>PortBuffer</i>.
It MUST also return the size of the returned information and the number of
devices for which it successfully enumerated information.</p><p>The client SHOULD free the returned buffer.</p><dl>
<dd>
<div><pre> error_status_t FAX_EnumPorts(
   [in] handle_t hBinding,
   [out, size_is(,*BufferSize)] LPBYTE* PortBuffer,
   [out, ref] LPDWORD BufferSize,
   [out, ref] LPDWORD PortsReturned
 );
</pre></div>
</dd></dl><p><b>hBinding: </b>The RPC binding handle for this
call. The client SHOULD reuse the RPC binding handle used as an input <i>hBinding</i>
argument for the <b>FAX_ConnectFaxServer</b> (section <span><a href="5cbfd38d-7a14-4560-ad24-9ed78f19a3bb" data-linktype="relative-path">3.1.4.1.10</a></span>)
or <b>FAX_ConnectionRefCount</b> (section <span><a href="a92941ac-bd07-4a71-af85-c2c157c97cf9" data-linktype="relative-path">3.1.4.1.11</a></span>) method
call used to connect to the fax server.</p><p><b>PortBuffer: </b>A pointer to the address of a
buffer to receive an array of <b>_FAX_PORT_INFO</b> (section <span><a href="ed920746-d222-4e0a-a75d-905f26cf1dfc" data-linktype="relative-path">2.2.8</a></span>)
structures. Each structure describes one fax port.</p><p><b>BufferSize: </b>A variable to return the size, in
bytes, of the port buffer.</p><p><b>PortsReturned: </b>A pointer to a <b>DWORD</b> (<span><a href="../ms-dtyp/cca27429-5689-4a16-b2b4-9325d93e4ba2" data-linktype="relative-path">[MS-DTYP]</a></span>
section <span><a href="../ms-dtyp/262627d8-3418-4627-9218-4ffe110850b2" data-linktype="relative-path">2.2.9</a></span>)
variable to receive the number of <b>_FAX_PORT_INFO</b> that the method
returns in the <i>PortBuffer</i> parameter.</p><p><b>Return Values: </b>This method MUST return
0x00000000 (ERROR_SUCCESS) for success; otherwise, it MUST return one of the
following error codes, one of the fax-specific errors that are defined in
section <span><a href="cbe6c4fb-4dda-4f6c-9701-0d490ba0d105" data-linktype="relative-path">2.2.52</a></span>, or one of
the other standard errors defined in <span><a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a></span>
section <span><a href="../ms-erref/18d8fbe8-a967-4f1c-ae50-99ca8e491d2d" data-linktype="relative-path">2.2</a></span>.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>ERROR_ACCESS_DENIED</p>
  <p>0x00000005</p>
  </td>
  <td>
  <p>Access is denied. The client&#39;s fax user account does
  not have the access rights (<b>FAX_ACCESS_QUERY_CONFIG</b>) required for this
  operation.</p>
  </td>
 </tr><tr>
  <td>
  <p>ERROR_NOT_ENOUGH_MEMORY</p>
  <p>0x00000008</p>
  </td>
  <td>
  <p>Not enough storage is available to process this
  command. The fax server cannot allocate sufficient memory to hold the array
  of <b>_FAX_PORT_INFO</b> to be returned to the client.</p>
  </td>
 </tr><tr>
  <td>
  <p>ERROR_INVALID_PARAMETER</p>
  <p>0x00000057</p>
  </td>
  <td>
  <p>The parameter is incorrect. This error code is
  returned if any of the following conditions are met:<a id="Appendix_A_Target_95"></a><a aria-label="Product behavior note 95" href="056171e7-80bc-45ff-8107-66ba3abb2023#Appendix_A_95" data-linktype="relative-path">&lt;95&gt;</a></p>
  <p><span>§<span>  
  </span></span>The <i>PortBuffer</i> parameter is set to a NULL pointer value.</p>
  <p><span>§<span>  
  </span></span>The <i>PortsReturned</i> parameter is set to a NULL pointer
  value.</p>
  </td>
 </tr><tr>
  <td>
  <p>ERROR_INTERNAL_ERROR</p>
  <p>0x0000054F</p>
  </td>
  <td>
  <p>The fax server failed to custom marshal the array of <b>_FAX_PORT_INFO</b>
  to be returned to the client.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>Exceptions Thrown: </b>No exceptions are thrown
except those that are thrown by the underlying <span><a href="46aba9c4-ebb1-4b10-86ac-4bb3025657b9#gt_8a7f6700-8311-45bc-af10-82e10accd331" data-linktype="relative-path">RPC</a></span> protocol, <span><a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a></span>.</p></div>