<div class="content"><p> </p><p>The QueryProviders method enumerates the providers of the
server.</p><dl>
<dd>
<div><pre> HRESULT QueryProviders(
   [in] DWORD masks,
   [out] IEnumVdsObject** ppEnum
 );
</pre></div>
</dd></dl><p><b>masks: </b>The combination of any values, by using
a bitwise OR operator, that the <span><a href="623b2151-a047-4d9c-aa17-61eab5d95f9c" data-linktype="relative-path">VDS_QUERY_PROVIDER_FLAG</a></span>
enumeration defines. The values that are set in the mask specify the types of
providers to return.</p><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 successfully completed, receives the IEnumVdsObject
interface of the object that contains an enumeration of provider objects on the
server. Callers MUST release the interface that is received 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 provider objects in the list of
cached storage management objects, as specified in section <span><a href="0d8d514a-16c5-44ae-b4bb-a333e19ea5b6" data-linktype="relative-path">3.4.1.3</a></span>,
and return an HRESULT that indicates failure or success.</p></div>