Historical Content Alert

This is a historical content for Windows NT 4.0 product and is presented for informative purposes only. All content in this directory is copyrighted and owned by Microsoft.


The createPKCS10 method creates a base64 encoded PKCS10 (in BSTR form) that can be submitted to a certificate server, requesting that a certificate be issued to the person/entity whose information is supplied in the PKCS10.

[VB] void createPKCS10(
  BSTR DNName, 
  BSTR Usage 
[C++] HRESULT createPKCS10(
  BSTR DNName,  // in
  BSTR Usage  // in


[VB][C++] DNName
The DN name must follow the X500 naming convention. For example "CN=User, O=Microsoft". If a two-letter prefix does not exist, an OID may be provided instead.
[VB][C++] Usage
An OID that describes the purpose of the certificate being generated. For example, Individual or Commercial Authenticode certificate, or Client Auth.

The purpose OID is just passed through to the PKCS10 request. For general extensibility and ease of understanding, the control does not attempt to understand specific purpose OIDs. Therefore if you specify a Client Auth OID, the generated keys will still be a signature key, not an exchange key.

Return Values

The return value from createPKCS10 is a base64 encoded PKCS10 request (in BSTR form). The format is such so that it can be directly posted to a WEB server for processing.


By default, the Microsoft Base Cryptographic Provider is used, PROV_RSA_FULL is the provider type, a signature key is created, and a unique new key set is created.

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