<div class="content"><p>The IStringCollection::Add (opnum 13) method adds an item to
the collection.</p><dl>
<dd>
<div><pre> HRESULT Add(
   [in] BSTR value,
   [out, retval] LONG* retval
 );
</pre></div>
</dd></dl><p><b>value: </b>The string to add to the collection.</p><p><b>retval: </b>The index of the added string in the
collection.</p><p><b>Return Values: </b>The method MUST return
information in an <b>HRESULT</b> data structure. The severity bit in the
structure identifies the following conditions:</p><ul><li><p><span><span>  </span></span>If
the severity bit is set to 0, the method completed successfully.</p>
</li><li><p><span><span>  </span></span>If
the severity bit is set to 1, the method failed and encountered a fatal error.</p>
</li></ul><dl>
<dd>
<p>If the collection is read-only,
the server SHOULD return WU_E_NOT_SUPPORTED (0x80240037).</p>
</dd></dl><p><b>Exceptions Thrown:</b> No exceptions are thrown beyond
those thrown by the underlying RPC protocol <span><a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a></span>.</p><p>This method SHOULD append the given value to the <b>List</b>
ADM element and increment the value of the <b>Count</b> ADM element.</p></div>