---
UID: NF:certenroll.IX509CertificateRequestPkcs10.get_CriticalExtensions
title: IX509CertificateRequestPkcs10::get_CriticalExtensions (certenroll.h)
description: Retrieves an IObjectIds collection that identifies the version 3 certificate extensions marked as critical.
old-location: security\ix509certificaterequestpkcs10_criticalextensions_property.htm
tech.root: seccertenroll
ms.assetid: 7ecde7cb-1a73-4fee-a949-c4bb36e61547
ms.date: 12/05/2018
ms.keywords: CriticalExtensions property [Security], CriticalExtensions property [Security],IX509CertificateRequestPkcs10 interface, IX509CertificateRequestPkcs10 interface [Security],CriticalExtensions property, IX509CertificateRequestPkcs10.CriticalExtensions, IX509CertificateRequestPkcs10.get_CriticalExtensions, IX509CertificateRequestPkcs10::CriticalExtensions, IX509CertificateRequestPkcs10::get_CriticalExtensions, certenroll/IX509CertificateRequestPkcs10::CriticalExtensions, certenroll/IX509CertificateRequestPkcs10::get_CriticalExtensions, get_CriticalExtensions, security.ix509certificaterequestpkcs10_criticalextensions_property
f1_keywords:
- certenroll/IX509CertificateRequestPkcs10.CriticalExtensions
dev_langs:
- c++
req.header: certenroll.h
req.include-header: 
req.target-type: Windows
req.target-min-winverclnt: Windows Vista [desktop apps only]
req.target-min-winversvr: Windows Server 2008 [desktop apps only]
req.kmdf-ver: 
req.umdf-ver: 
req.ddi-compliance: 
req.unicode-ansi: 
req.idl: 
req.max-support: 
req.namespace: 
req.assembly: 
req.type-library: 
req.lib: 
req.dll: CertEnroll.dll
req.irql: 
topic_type:
- APIRef
- kbSyntax
api_type:
- COM
api_location:
- CertEnroll.dll
api_name:
- IX509CertificateRequestPkcs10.CriticalExtensions
- IX509CertificateRequestPkcs10.get_CriticalExtensions
targetos: Windows
req.typenames: 
req.redist: 
ms.custom: 19H1
---

# IX509CertificateRequestPkcs10::get_CriticalExtensions


## -description


The <b>CriticalExtensions</b> property retrieves an <a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nn-certenroll-iobjectids">IObjectIds</a> collection that identifies the version 3 certificate extensions marked as critical.

This property is read-only.


## -parameters


## -remarks



The extension criticality indicates to an application that uses certificates whether it can ignore the extension. You must initialize the <a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nn-certenroll-ix509certificaterequestpkcs10">IX509CertificateRequestPkcs10</a> object before calling this property. For more information, see any of the following methods:

<ul>
<li>
<a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nf-certenroll-ix509certificaterequestpkcs10-initializedecode">InitializeDecode</a>
</li>
<li>
<a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nf-certenroll-ix509certificaterequestpkcs10-initializefromcertificate">InitializeFromCertificate</a>
</li>
<li>
<a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nf-certenroll-ix509certificaterequestpkcs10-initializefromprivatekey">InitializeFromPrivateKey</a>
</li>
<li>
<a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nf-certenroll-ix509certificaterequestpkcs10-initializefrompublickey">InitializeFromPublicKey</a>
</li>
<li>
<a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nf-certenroll-ix509certificaterequestpkcs10-initializefromtemplatename">InitializeFromTemplateName</a>
</li>
</ul>



## -see-also




<a href="https://docs.microsoft.com/windows/desktop/api/certenroll/nn-certenroll-ix509certificaterequestpkcs10">IX509CertificateRequestPkcs10</a>
 

 

