<div class="content"><p> </p><p>The <b>R_DhcpRestoreDatabase</b> method sets/modifies the
restore path. The DHCP server uses this path to restore the configuration,
settings, and DHCP client lease record the next time it is restarted.</p><dl>
<dd>
<div><pre> DWORD R_DhcpRestoreDatabase(
   [in, unique, string] DHCP_SRV_HANDLE ServerIpAddress,
   [in, string] LPWSTR Path
 );
</pre></div>
</dd></dl><p><b>ServerIpAddress: </b>The IP address/host name of
the DHCP server. This parameter is unused.</p><p><b>Path: </b>A pointer to a null-terminated Unicode
string that contains the name of the new restore path where the registry
configuration and the DHCP database are restored.</p><p><b>Return Values: </b>A 32-bit unsigned integer value
that indicates return status. A return value ERROR_SUCCESS (0x00000000)
indicates that the operation was completed successfully, else it contains a
Win32 error code, as specified in <span><a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a></span>.
This error code value can correspond to a DHCP-specific failure, which takes a
value between 20000 and 20099, or any generic failure.</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>ERROR_SUCCESS</p>
  </td>
  <td>
  <p>The call was successful.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x00004E2D</p>
  <p>ERROR_DHCP_JET_ERROR</p>
  </td>
  <td>
  <p>An error occurred while accessing the DHCP server.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p>The opnum field value for this method is 45.</p><p>When processing this call, the DHCP server MUST do the
following:</p><ul><li><p><span><span> 
</span></span>Validate if this method is authorized for read/write access per
section <span><a href="38840bd0-0a5a-47ed-bc69-0dd870d33aec" data-linktype="relative-path">3.5.5</a></span>. If not,
return the error ERROR_ACCESS_DENIED.</p>
</li><li><p><span><span> 
</span></span>If the <i>Path</i> is not from the standard backup path, back up
the existing information stored in the ADM elements in the standard backup path
so that it can be used if the restore for the new ADM elements fails.</p>
</li><li><p><span><span> 
</span></span>Set the server ADM element <b>DHCPServerRestorePath</b> to the
path from where the ADM elements are to be restored when the DHCP server starts
again.</p>
</li></ul><p><b>Exceptions Thrown:</b> No exceptions are thrown beyond
those thrown by the underlying RPC protocol <span><a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a></span>.</p></div>