<div class="content" name="FAX_GetLoggingCategories" uuid="179c641c-0734-45d8-9bf3-66e82005c518"><p>The <b>FAX_GetLoggingCategories (Opnum 21)</b> method is
called by the client. In response, the server MUST return the current logging
categories for the fax server to which the client has connected. A logging
category determines the errors or other events that the fax server records in
the application event log.</p><p>The client SHOULD free the returned buffer.</p><dl>
<dd>
<div><pre> error_status_t FAX_GetLoggingCategories(
   [in] handle_t hBinding,
   [out, size_is(, *BufferSize)] LPBYTE* Buffer,
   [out, ref] LPDWORD BufferSize,
   [out, ref] LPDWORD NumberCategories
 );
</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 <a href="5cbfd38d-7a14-4560-ad24-9ed78f19a3bb" data-linktype="relative-path">3.1.4.1.10</a>) or <b>FAX_ConnectionRefCount</b> (section
<a href="a92941ac-bd07-4a71-af85-c2c157c97cf9" data-linktype="relative-path">3.1.4.1.11</a>) method call
used to connect to the fax server.</p><p><b>Buffer: </b>A pointer to the address of a buffer
to receive an array of <b>FAX_LOG_CATEGORY</b> (section <a href="6c692dec-d375-41f6-a6b8-670416245b9f" data-linktype="relative-path">2.2.11</a>) structures. The
number of structures included in the array is set by <b>NumberCategories</b>.
Each structure describes one current logging category. The <b>Name</b> strings
are appended after the <b>FAX_LOG_CATEGORY</b> entries. The <b>Name</b> field
of each <b>FAX_LOG_CATEGORY</b> is an offset indicating the location of the
associated <b>Name</b> string in the buffer.<a id="Appendix_A_Target_113"></a><a aria-label="Product behavior note 113" href="056171e7-80bc-45ff-8107-66ba3abb2023#Appendix_A_113" data-linktype="relative-path">&lt;113&gt;</a></p><p><b>BufferSize: </b>A variable to return the size, in
bytes, of the buffer.</p><p><b>NumberCategories: </b> A pointer to a <b>DWORD</b>
(<a href="../ms-dtyp/cca27429-5689-4a16-b2b4-9325d93e4ba2" data-linktype="relative-path">[MS-DTYP]</a>
section <a href="../ms-dtyp/262627d8-3418-4627-9218-4ffe110850b2" data-linktype="relative-path">2.2.9</a>)
variable to receive the number of <b>FAX_LOG_CATEGORY</b> that the method
returns in the <i>Buffer</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 <a href="cbe6c4fb-4dda-4f6c-9701-0d490ba0d105" data-linktype="relative-path">2.2.52</a>, or one
of the other standard errors defined in <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>
section <a href="../ms-erref/18d8fbe8-a967-4f1c-ae50-99ca8e491d2d" data-linktype="relative-path">2.2</a>.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>ERROR_ACCESS_DENIED 0x00000005</td>
  <td>Access is denied. The client&#39;s fax user account does not have the FAX_ACCESS_QUERY_CONFIG access rights required for this operation.</td>
 </tr><tr>
  <td>ERROR_NOT_ENOUGH_MEMORY 0x00000008</td>
  <td>The server cannot allocate sufficient memory to hold the array of FAX_LOG_CATEGORY to be returned to the client.</td>
 </tr><tr>
  <td>ERROR_INVALID_PARAMETER 0x00000057</td>
  <td>The parameter is incorrect. This error code is returned if any of the following conditions are met: § The BufferSize parameter is set to a NULL pointer value.&lt;114&gt; § The NumberCategories parameter is set to a NULL pointer value.&lt;115&gt;</td>
 </tr><tr>
  <td>ERROR_ARITHMETIC_OVERFLOW 0x00000216</td>
  <td>This error code is returned if any of the following conditions are met: § The total number of logging categories multiplied by the size, in bytes, of the FAX_LOG_CATEGORY Fixed_Size block results in a number that exceeds the maximum value for a DWORD (0xFFFFFFFF). § The total number of logging categories multiplied by the size, in bytes, of the FAX_LOG_CATEGORY Fixed_Size block plus the sum of all lengths, in bytes, including NULL terminators, of all Name strings from the Variable_Data blocks results in a number that exceeds the maximum value for a DWORD (0xFFFFFFFF).</td>
 </tr><tr>
  <td>ERROR_INTERNAL_ERROR 0x0000054F</td>
  <td>The server failed to custom marshal the array of FAX_LOG_CATEGORY to be returned to the client.</td>
 </tr></tbody></table>
</dd></dl><p><b>Exceptions Thrown:</b> No exceptions are thrown
except those that are thrown by the underlying <a href="46aba9c4-ebb1-4b10-86ac-4bb3025657b9#gt_8a7f6700-8311-45bc-af10-82e10accd331" data-linktype="relative-path">RPC</a> protocol, <a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a>.</p></div>