<div class="content"><p>The IAppHostChangeHandler describes an <a href="4e36e522-a35d-4fec-bc9c-6ed14d49d5ca#gt_95913fbd-3262-47ae-b5eb-18e6806824b9" data-linktype="relative-path">interface</a> that clients can
implement and that is called when the administration system has detected a
change in a part of its path hierarchy.</p><p>To receive incoming remote calls for this interface, the
client MUST implement this interface (09829352-87c2-418d-8d79-4133969a489d). It
MUST then specify an object that implements this interface to the <a href="1e694f74-02bd-4bae-a74f-abf7a9bc4610" data-linktype="relative-path">IAppHostAdminManager::SetMetadata()</a>
method by using a bstrMetadataName of &#34;changeHandler&#34;. </p><p>The server then calls this object when the administration
system detects a change. The administration system is free to determine the
supported time period during which the changes are detected and conveyed
through this interface. The time period is either the lifetime of the
administration system or a shorter time period. </p><p>The IAppHostChangeHandler interface inherits opnums 0–2 from
the <a href="../ms-dcom/2b4db106-fb79-4a67-b45f-63654f19c54c" data-linktype="relative-path">IUnknown</a>
interface.</p><p>Methods in RPC Opnum Order</p><table><thead>
  <tr>
   <th>
   <p>Method</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p><a href="c46852f7-3702-499d-a97e-458e6216fd37" data-linktype="relative-path">OnSectionChanges</a></p>
  </td>
  <td>
  <p>Opnum: 3</p>
  </td>
 </tr></tbody></table><p> </p></div>