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Extension object

[CAPICOM is a 32-bit only component that is available for use in the following operating systems: Windows Server 2008, Windows Vista, and Windows XP. Instead, use the X509Extension Class in the System.Security.Cryptography.X509Certificates namespace.]

The Extension object represents a single certificate extension.

When to use

The Extension object is used to perform the following tasks:

  • Retrieve the OID of the certificate extension.
  • Retrieve the certificate extension data represented by an EncodedData object.
  • Determine whether the certificate extension is marked as critical.

Members

The Extension object has these types of members:

Properties

The Extension object has these properties.

PropertyAccess typeDescription

EncodedData

Read-only

Retrieves the encoded data for the extension.

IsCritical

Read-only

Retrieves a Boolean value that indicates whether the extension is marked critical.

OID

Read-only

Retrieves the object identifier for the extension. This is the default property.

 

Remarks

The Extension object cannot be created.

The Extension object is used by the Extensions collection object.

Requirements

End of client support

Windows Vista

End of server support

Windows Server 2008

Redistributable

CAPICOM 2.0 or later on Windows Server 2003 and Windows XP

DLL

Capicom.dll

 

 

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