<div class="content"><p> </p><p>The GetUniqueId method<a id="Appendix_A_Target_104"></a><a aria-label="Product behavior note 104" href="6b2552ee-ba27-409f-99a8-18841573327a#Appendix_A_104" data-linktype="relative-path">&lt;104&gt;</a>
retrieves the device path that the operating system uses to identify the disk.</p><dl>
<dd>
<div><pre> HRESULT GetUniqueId(
   [out, string] LPWSTR* ppwszId
 );
</pre></div>
</dd></dl><p><b>ppwszId: </b>A pointer to a null-terminated
Unicode device path that the operating system uses to identify the device for
the disk.</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>ppwszId</i> is not NULL.</p>
</li></ul><p>The server MUST set the <i>ppwszId</i> parameter to the
address of a null-terminated Unicode string and then return an <a href="../ms-dtyp/a9046ed2-bfb2-4d56-a719-2824afce59ac" data-linktype="relative-path"><span>HRESULT</span></a> that indicates
success or failure.</p></div>