<div class="content" name="R_W3QueryStatistics2" uuid="4261b01c-951a-4bce-a0e4-273254604eb8"><p>The <b>R_W3QueryStatistics2</b> method is called by the
client. In response, the server returns statistical data from the HTTP server.</p><dl>
<dd>
<div><pre> DWORD R_W3QueryStatistics2(
   [in, string, unique] INET_INFO_IMPERSONATE_HANDLE pszServer,
   [in] DWORD dwLevel,
   [in] DWORD dwInstance,
   [in] DWORD dwReserved,
   [out, switch_is(dwLevel)] LPW3_STATISTICS_STRUCT InfoStruct
 );
</pre></div>
</dd></dl><p><b>pszServer: </b>The custom binding handle for the
target system, as specified in section <a href="a6931aa0-3ab6-4018-a398-e142cb8e409e" data-linktype="relative-path">2.1.1</a>. The value MUST NOT
be used by the server implementation. </p><p><b>dwLevel: </b>The level of detail to be retrieved.
This parameter MUST be set to 0 by the client. Other values MUST generate a
return code of ERROR_INVALID_LEVEL (0x0000007C).</p><p><b>dwInstance: </b>The ID of the protocol <a href="ce912734-75c3-403c-8816-38e34e24df2f#gt_1623705d-a7a0-4e46-9a66-66e9ee63d961" data-linktype="relative-path">server instance</a> whose
statistical data is being requested. The following values have special
meanings.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0x000000000</td>
  <td>Return global (not per server instance) statistics data.</td>
 </tr><tr>
  <td>0xf0000003</td>
  <td>Return statistics aggregated across all protocol server instances.</td>
 </tr></tbody></table>
</dd></dl><p><b>dwReserved: </b>This value MUST be ignored by the
server.</p><p><b>InfoStruct: </b>The pointer to a <a href="c1572127-a6ba-4b11-b3f6-856297313cca" data-linktype="relative-path"><b>W3_STATISTICS_STRUCT</b></a>
union to contain the retrieved statistics data.</p><p><b>Return Values: </b>The method returns 0
(ERROR_SUCCESS) to indicate success; otherwise, it returns a nonzero error
code, as specified 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>
or [MS-ERREF] section <a href="../ms-erref/596a1078-e883-4972-9bbc-49e60bebca55" data-linktype="relative-path">2.3.1</a>.
The most common error codes are listed in the following table.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0x00000002 ERROR_FILE_NOT_FOUND</td>
  <td>The system cannot find the specified file.</td>
 </tr><tr>
  <td>0x0000007C ERROR_INVALID_LEVEL</td>
  <td>The system call level is not correct.</td>
 </tr><tr>
  <td>0x00000426 ERROR_SERVICE_NOT_ACTIVE</td>
  <td>The service is not running.</td>
 </tr></tbody></table>
</dd></dl><p><b>Exceptions Thrown:</b> No exceptions are thrown
beyond those thrown by the underlying <a href="ce912734-75c3-403c-8816-38e34e24df2f#gt_8a7f6700-8311-45bc-af10-82e10accd331" data-linktype="relative-path">RPC</a> protocol, as specified
in <a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a>.
</p><p>In response to this request from the client, the server MUST
initialize <i>InfoStruct</i> with the statistical data for the HTTP server if
the return code indicates success.</p></div>