<div class="content"><p> </p><p>The QueryVolumes method retrieves the <span><a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_9a876829-33a1-4f0b-8b81-8552b7e5561c" data-linktype="relative-path">volumes</a></span>
of a <span><a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_a6543827-8d70-4e5a-a982-2fdc2e7f8bca" data-linktype="relative-path">disk
pack</a></span>.</p><dl>
<dd>
<div><pre> HRESULT QueryVolumes(
   [out] IEnumVdsObject** ppEnum
 );
</pre></div>
</dd></dl><p><b>ppEnum: </b>A pointer to an <span><a href="29084d98-40c8-4a10-a45e-4cfc0d8f8f03" data-linktype="relative-path">IEnumVdsObject</a></span>
interface that, if the operation is successfully completed, receives the
IEnumVdsObject interface of the object that contains an enumeration of volume
objects in the <span><a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_890bb28d-df68-420f-a8bc-83899d34ad5c" data-linktype="relative-path">pack</a></span>. Callers MUST
release the interface when they are done with it.</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>ppEnum</i> is not NULL.</p>
</li></ul><p>The server MUST point <i>ppEnum</i> to an IEnumVdsObject
interface that contains the enumeration of volume objects in the list of cached
storage management objects that have their pack pointer set to this pack
object. The server MUST then return an HRESULT indicating failure or success.
For information on enumeration objects, see section <span><a href="0d8d514a-16c5-44ae-b4bb-a333e19ea5b6" data-linktype="relative-path">3.4.1.3</a></span>.</p></div>