<div class="content"><p> </p><p>The get_EventObjectChangeEventClassID method extracts the
server-specific <span><a href="66217d57-8c60-4423-9b24-52923f4c2afa" data-linktype="relative-path">EventClassID</a></span> for
server-specific event class or <span><a href="0d617a76-fc58-455c-9e30-1a8436c5f73a" data-linktype="relative-path">subscription</a></span> change
notifications.</p><dl>
<dd>
<div><pre> [id(4), propget, helpstring(&#34;method get_EventObjectChangeEventClassID&#34;)] HRESULT EventObjectChangeEventClassID(
   [out, retval] BSTR* pbstrEventClassID
 );
</pre></div>
</dd></dl><p><b>pbstrEventClassID: </b>If the method call returns
a success <span><a href="../ms-dtyp/a9046ed2-bfb2-4d56-a719-2824afce59ac" data-linktype="relative-path">HRESULT</a></span>,
this MUST contain the returned unique identifier representing the EventClassID
for the <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_434b0234-e970-4e8c-bdfa-e16a30d96703" data-linktype="relative-path">server</a></span> specific
EventClass/Subscription change notifications. This MUST be a <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_f49694cc-c350-462d-ab8e-816f0103c6c1" data-linktype="relative-path">GUID</a></span>
specified as a string as specified in section <span><a href="f17c65f2-82cc-43bd-ba6f-0a6f05737f9c" data-linktype="relative-path">2.2.3</a></span>.</p><p><b>Return Values: </b>An HRESULT specifying success
or failure. All success codes MUST be treated the same, and all failure codes
MUST be treated the same.</p><p>When this method is called, a server SHOULD return the
EventClassID of an event class supporting notifications of changes to the server’s
<span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_e8df25db-9bff-46df-b607-d072dd29c02b" data-linktype="relative-path">event
class</a></span> store and <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_6d17ce3a-aa95-4db2-83f1-09d5feef3f95" data-linktype="relative-path">subscriber</a></span> store.
The server MAY instead fail the method call if it does not support such an
event class.</p></div>