<div class="content" name="AddElement" uuid="fb641e3c-147e-41f4-b4fa-e2b4d2286f99"><p>The AddElement method is received by the server in an
RPC_REQUEST packet. In response, the server attempts to add a newly created <a href="59774887-09e3-4de5-ad8e-4794f404b123" data-linktype="relative-path">IAppHostElement</a> object to
the specified collection.</p><p>This function adds an element to the current collection of
elements.</p><dl>
<dd>
<div><pre> HRESULT AddElement(
   [in] IAppHostElement* pElement,
   [in, defaultvalue(-1)] int cPosition
 );
</pre></div>
</dd></dl><p><b>pElement: </b>The element to add to the
collection.</p><p><b>cPosition: </b>The position at which the element
was added to the collection. If -1, the new element is appended. Otherwise, the
position represents the zero-based index to the collection.</p><p><b>Return Values: </b>The server MUST return zero if
it successfully processes the message that is received from the client. If
processing fails, the server MUST return a nonzero <a href="../ms-dtyp/a9046ed2-bfb2-4d56-a719-2824afce59ac" data-linktype="relative-path">HRESULT</a>
code as defined in <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>.
The following table describes the error conditions that MUST be handled and the
corresponding error codes. A server MAY return additional
implementation-specific error codes.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0X00000000 NO_ERROR</td>
  <td>The operation completed successfully.</td>
 </tr><tr>
  <td>0X80070057 ERROR_INVALID_PARAMETER</td>
  <td>One or more parameters are incorrect or null.</td>
 </tr><tr>
  <td>0X00000008 ERROR_NOT_ENOUGH_MEMORY</td>
  <td>Not enough memory is available to process this command.</td>
 </tr><tr>
  <td>0X80070021 ERROR_LOCK_VIOLATION</td>
  <td>The instance is not editable.</td>
 </tr><tr>
  <td>0X80070585 ERROR_INVALID_INDEX</td>
  <td>The index specified by cPosition is invalid.</td>
 </tr></tbody></table>
</dd></dl><p> </p></div>