<div class="content" name="QueryPacks" uuid="a1259980-2ab7-4453-9af7-4d72f7b9f1f8"><p>The QueryPacks method retrieves the provider <a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_a6543827-8d70-4e5a-a982-2fdc2e7f8bca" data-linktype="relative-path">disk packs</a>.</p><dl>
<dd>
<div><pre> HRESULT QueryPacks(
   [out] IEnumVdsObject** ppEnum
 );
</pre></div>
</dd></dl><p><b>ppEnum: </b>A pointer to an <a href="29084d98-40c8-4a10-a45e-4cfc0d8f8f03" data-linktype="relative-path">IEnumVdsObject</a> interface
that, if the operation is successfully completed, receives the IEnumVdsObject
interface of the object containing an enumeration of <a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_890bb28d-df68-420f-a8bc-83899d34ad5c" data-linktype="relative-path">pack</a> objects in the
provider. 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 <a href="8eef5d42-22d7-4302-aed9-12face91505a#gt_799103ab-b3cb-4eab-8c55-322821b2b235" data-linktype="relative-path">HRESULT</a> (as
specified in <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>)
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 <a href="5102cc53-3143-4268-ba4c-6ea39e999ab4" data-linktype="relative-path">2.2.3</a>.</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 pack objects in the list of cached
storage management objects that have their provider pointer set to this
provider object. The server MUST then return an HRESULT indicating failure or
success. For details on enumeration objects, see section <a href="0d8d514a-16c5-44ae-b4bb-a333e19ea5b6" data-linktype="relative-path">3.4.1.3</a>. </p></div>