<div class="content"><p>The <b>CERT_EKU_1</b> structure<a id="Appendix_A_Target_175"></a><a aria-label="Product behavior note 175" href="3bb906f0-b077-47ab-ad11-d8d807afde26#Appendix_A_175" data-linktype="relative-path">&lt;175&gt;</a> contains the <a href="fc2dfae9-0d04-4e1d-97c9-c51c2dc06c3b#gt_06beeb29-6e93-4472-a53d-bbd51eca5759" data-linktype="relative-path">EKU</a> <a href="fc2dfae9-0d04-4e1d-97c9-c51c2dc06c3b#gt_aaaf2f1a-0b0a-487e-a0f0-c3510a6091b2" data-linktype="relative-path">OID</a> or EKU name of an x.509
certificate (see <a href="https://go.microsoft.com/fwlink/?LinkId=90356" data-linktype="external">[RFC2459]</a>).</p><table>
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  <td colspan="32">
  <p>dwSize</p>
  </td>
 </tr>
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  <td colspan="32">
  <p>IsEKUOID</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>pwszEKU
  (variable)</p>
  </td>
 </tr>
 <tr>
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  <p>...</p>
  </td>
 </tr>
</tbody></table><p><b>dwSize (4 bytes): </b>The size (in bytes) of <i>pwszEKU</i>.</p><p><b>IsEKUOID (4 bytes): </b>Specifies a Boolean value
that indicates whether the <i>pwszEKU</i> parameter specifies the EKU OID or
EKU name of a <a href="fc2dfae9-0d04-4e1d-97c9-c51c2dc06c3b#gt_7a0f4b71-23ba-434f-b781-28053ed64879" data-linktype="relative-path">certificate</a>.
If this parameter is a TRUE value, <i>pwszEKU</i> specifies an EKU OID of a
certificate. Otherwise, <i>pwszEKU</i> specifies an EKU name of a connection.</p><p><b>pwszEKU (variable): </b>A pointer to the EKU OID
or EKU name of a certificate.</p></div>