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CredGetSessionTypes function (wincred.h)

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The CredGetSessionTypes function returns the maximum persistence supported by the current logon session. A separate maximum persistence is returned for each credential type.

Syntax

BOOL CredGetSessionTypes(
  [in]  DWORD   MaximumPersistCount,
  [out] LPDWORD MaximumPersist
);

Parameters

[in] MaximumPersistCount

Number of elements in the MaximumPersist array. Use CRED_TYPE_MAXIMUM to return all of the currently defined credential types.

[out] MaximumPersist

Pointer to an array to return the persistence values in. The passed in array should be MaximumPersistCount elements long. On return, each element specifies the maximum persistence supported by the corresponding credential type.

The caller should use one of the following defines to index into the array:

  • CRED_TYPE_GENERIC
  • CRED_TYPE_DOMAIN_PASSWORD
  • CRED_TYPE_DOMAIN_CERTIFICATE
That is, MaximumPersist[CRED_TYPE_GENERIC] specifies the maximum persistence supported for generic credentials.

The following values can be returned in each element of the array.

Value Meaning
CRED_PERSIST_NONE
 No credential can be stored. This value will be returned if the credential type is not supported or has been disabled by policy.
CRED_PERSIST_SESSION
 Only a session-specific credential can be stored.
CRED_PERSIST_LOCAL_MACHINE
 Session-specific and computer-specific credentials can be stored.

Windows XP:  This credential cannot be stored for sessions in which the profile is not loaded.
CRED_PERSIST_ENTERPRISE
 Any credential can be stored.

Windows XP:  This credential cannot be stored for sessions in which the profile is not loaded.

Return value

This function returns TRUE on success and FALSE on failure. The GetLastError function can be called to get a more specific status code. The following status code can be returned:

ERROR_NO_SUCH_LOGON_SESSION

The logon session does not exist or there is no credential set associated with this logon session. Network logon sessions do not have an associated credential set.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header wincred.h
Library Advapi32.lib
DLL Advapi32.dll