<div class="content"><p> </p><p>The <b>R_DhcpV4SetPolicyEnforcement</b> method is used to
set the state (enable/disable) of policy enforcement of the server or the
specified IPv4 subnet.</p><dl>
<dd>
<div><pre> DWORD R_DhcpV4SetPolicyEnforcement(
   [in, unique, string] DHCP_SRV_HANDLE ServerIpAddress,
   [in] BOOL ServerPolicy,
   [in] DHCP_IP_ADDRESS SubnetAddress,
   [in] BOOL Enable
 );
</pre></div>
</dd></dl><p><b>ServerIpAddress: </b>The IP address/host name of
the DHCP server. This parameter is unused.</p><p><b>ServerPolicy: </b>This Boolean type indicates if
the policy enforcement state of the server can be set.</p><p><b>SubnetAddress: </b>This is of type <b>DHCP_IP_ADDRESS</b>
structure (section <span><a href="5122557b-b85d-4982-8ffb-98d8d934e353" data-linktype="relative-path">2.2.1.2.1</a></span>), which
contains the IPv4 subnet ID for which the policy enforcement state can be
returned. This parameter is ignored if the <i>ServerPolicy</i> parameter is
TRUE.</p><p><b>Enable: </b>This Boolean type parameter specifies
the value to set for policy enforcement.</p><p><b>Return Values: </b>A 32-bit unsigned integer value
that indicates return status. A return value of ERROR_SUCCESS (0x00000000)
indicates operation was completed successfully. Otherwise, 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>0x00004E25</p>
  <p>ERROR_DHCP_SUBNET_NOT_PRESENT</p>
  </td>
  <td>
  <p>The specified IPv4 subnet does not exist.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p>The opnum field value for this method is 107.</p><p>When processing this call, the DHCP server MUST do the
following:</p><ul><li><p><span><span> 
</span></span>If <i>ServerPolicy</i> parameter is TRUE and <i>SubnetAddress</i>
parameter is not NULL or if <i>ServerPolicy</i> parameter is FALSE and <i>SubnetAddress</i>
parameter is NULL, return ERROR_INVALID_PARAMETER.</p>
</li><li><p><span><span> 
</span></span>Validate whether this method is authorized for read/write access
as specified in section <span><a href="38840bd0-0a5a-47ed-bc69-0dd870d33aec" data-linktype="relative-path">3.5.5</a></span>. If not,
return ERROR_ACCESS_DENIED.</p>
</li><li><p><span><span> 
</span></span>If <i>ServerPolicy</i> parameter is TRUE, set the server ADM
element <b>DHCPv4ServerPolicyEnforcement</b> with the value passed in the <i>Enable</i>
parameter and return ERROR_SUCCESS.</p>
</li><li><p><span><span> 
</span></span>If <i>ServerPolicy</i> parameter is FALSE, retrieve the server
ADM element <b>DHCPv4ScopesList</b>. Retrieve the <b>DHCPv4Scope</b> ADM
element entry corresponding to the <i>SubnetAddress</i> parameter from the
server ADM element <b>DHCPv4ScopesList</b>. If the <b>DHCPv4Scope</b> ADM
element entry is not present, return ERROR_DHCP_SUBNET_NOT_PRESENT.</p>
</li><li><p><span><span> 
</span></span>Set the <b>DHCPv4Scope.DHCPv4ScopePolicyEnforcement</b> ADM
element for the retrieved <b>DHCPv4Scope</b> ADM element with the value passed
in the <i>Enable</i> parameter.</p>
</li><li><p><span><span> 
</span></span>Return ERROR_SUCCESS.</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>