<div class="content"><p> </p><p>The Unadvise method unregisters a client from being notified
by the server of changes to storage objects.</p><dl>
<dd>
<div><pre> HRESULT Unadvise(
   [in] DWORD dwCookie
 );
</pre></div>
</dd></dl><p><b>dwCookie: </b>The cookie value generated when the <span><a href="731af954-1530-470d-bc06-31f0c34ae932" data-linktype="relative-path">IVdsAdviseSink</a></span>
interface was registered.</p><p><b>Return Values: </b>The method MUST return zero or
a non-error <span><a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_799103ab-b3cb-4eab-8c55-322821b2b235" data-linktype="relative-path">HRESULT</a></span> (as
specified in <span><a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a></span>)
to indicate success, or return an implementation-specific nonzero error code to
indicate failure. For the HRESULT values predefined by the Virtual Disk Service
Remote Protocol, see section <span><a href="5102cc53-3143-4268-ba4c-6ea39e999ab4" data-linktype="relative-path">2.2.3</a></span>.</p><p>When the server receives this message, it MUST validate the
following parameter:</p><ul><li><p><span><span> 
</span></span>Verify that <i>dwCookie</i> corresponds to a callback object in
the list of callback objects.</p>
</li><li><p><span><span> 
</span></span>Remove the IVdsAdviseSink interface that pSink specifies from the
list of callback objects.</p>
</li></ul><p>The server MUST return an HRESULT indicating failure or
success.</p></div>