<div class="content"><p>The DeleteBackup method deletes a <a href="1243ba70-74ca-44f9-be0b-dfd6697010b4#gt_086b13f2-2715-4000-a16c-6acc3d59cc19" data-linktype="relative-path">metabase</a> backup.</p><dl>
<dd>
<div><pre> HRESULT DeleteBackup(
   [unique, in, string] LPCWSTR pszMDBackupName,
   [in] DWORD dwMDVersion
 );
</pre></div>
</dd></dl><p><b>pszMDBackupName: </b>A string of up to 100 Unicode
characters that names the backup.</p><p><b>dwMDVersion: </b>Either an integer value
specifying the version number of the backup to be deleted or the following
constant.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>MD_BACKUP_HIGHEST_VERSION</p>
  <p>0xFFFFFFFE</p>
  </td>
  <td>
  <p>Delete the existing backup with the highest version
  number.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>Return Values: </b>A signed 32-bit value that
indicates return status. If the method returns a negative value, it failed. If
the 12-bit facility code (bits 16–27) is set to 0x007, the value contains a
Win32 error code in the lower 16 bits. Zero or positive values indicate success,
with the lower 16 bits in positive nonzero values containing warnings or flags
defined in the method implementation. For more information about Win32 error
codes and <a href="../ms-dtyp/a9046ed2-bfb2-4d56-a719-2824afce59ac" data-linktype="relative-path">HRESULT</a>
values, see <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>0x00000000</p>
  <p>S_OK</p>
  </td>
  <td>
  <p>The call was successful.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x80070057</p>
  <p>E_INVALIDARG</p>
  </td>
  <td>
  <p>One or more arguments are invalid.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x80070002</p>
  <p>ERROR_FILE_NOT_FOUND</p>
  </td>
  <td>
  <p>The system cannot find the file specified.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x80070008</p>
  <p>ERROR_NOT_ENOUGH_MEMORY</p>
  </td>
  <td>
  <p>There is not enough memory to complete the operation.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p>The <a href="1243ba70-74ca-44f9-be0b-dfd6697010b4#gt_e127848e-c66d-427d-b3aa-9f904fa4ada7" data-linktype="relative-path">opnum</a>
field value for this method is 31. </p><p>When processing this call, the server MUST do the following:</p><ul><li><p><span><span> 
</span></span>If the <i>pszMDBackupName</i> parameter is not an empty string
and it contains any characters in the following set (&#39;/&#39;, &#39;\&#39;, &#39;*&#39;, &#39;.&#39;, &#39;?&#39;,
&#39;&#34;&#39;, &#39;&amp;&#39;, &#39;!&#39;, &#39;@&#39;, &#39;#&#39;, &#39;$&#39;, &#39;%&#39;, &#39;^&#39;, &#39;(&#39;, &#39;)&#39;, &#39;=&#39;, &#39;+&#39;, &#39;|&#39;, &#39;`&#39;,
&#39;~&#39;), return E_INVALIDARG.</p>
</li><li><p><span><span> 
</span></span>If the <i>pszMDBackupName</i> parameter is empty or is not the
name of a backup, return ERROR_FILE_NOT_FOUND.</p>
</li><li><p><span><span> 
</span></span>Check the <i>dwMDVersion</i> parameter. If this parameter is
equal to MD_BACKUP_HIGHEST_VERSION, find and delete the very last backup.
Otherwise, find and delete the backup with the requested version number. If a
backup does not exist, return ERROR_FILE_NOT_FOUND.</p>
</li></ul></div>