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1/6/2010
This function finds the first extension in the CERT_EXTENSION array, as identified by its object identifier (OID). This function can be used in the processing of a decoded certificate. A CERT_INFO structure is derived from a decoded certificate. The rgExtension array is retrieved from that structure and passed to this function in the rgExtension parameter. This function determines whether a particular extension is in the array, and if so, returns a pointer to it.
Syntax
PCERT_EXTENSION WINAPI CertFindExtension(
  LPCSTR pszObjId,
  DWORD cExtensions,
  CERT_EXTENSION rgExtensions[ ]
);
Parameters
- pszObjId
[in] Pointer to the OID to use in the search. 
- cExtensions
[in] Number of extensions in the rgExtensions array. 
- rgExtensions
[in] Array of CERT_EXTENSION structures. 
Return Value
This function returns a pointer to the extension, if one is found. Otherwise, NULL is returned.
Requirements
| Header | wincrypt.h | 
| Library | crypt32.lib | 
| Windows Embedded CE | Windows CE 3.0 and later | 
See Also
Reference
Certificates Functions
CertFindAttribute
CertFindRDNAttr
CERT_EXTENSION
CERT_INFO