AuditComputeEffectivePolicyBySid function

The AuditComputeEffectivePolicyBySid function computes the effective audit policy for one or more subcategories for the specified security principal. The function computes effective audit policy by combining system audit policy with per-user policy.


BOOLEAN AuditComputeEffectivePolicyBySid(
  const PSID                pSid,
  const GUID                *pSubCategoryGuids,
  ULONG                     dwPolicyCount,



A pointer to the SID structure associated with the principal for which to compute effective audit policy. Per-user policy for group SIDs is not currently supported.


A pointer to an array of GUID values that specify the subcategories for which to compute effective audit policy. For a list of defined subcategories, see Auditing Constants.


The number of elements in each of the pSubCategoryGuids and ppAuditPolicy arrays.


A pointer to a single buffer that contains both an array of pointers to AUDIT_POLICY_INFORMATION structures and the structures themselves. The AUDIT_POLICY_INFORMATION structures specify the effective audit policy for the subcategories specified by the pSubCategoryGuids array.

When you have finished using this buffer, free it by calling the AuditFree function.

Return Value

If the function succeeds, it returns TRUE.

If the function fails, it returns FALSE. To get extended error information, call GetLastError. GetLastError may return one of the following error codes defined in WinError.h.

Return code/value Description
The caller does not have the privilege or access rights necessary to call this function.
87 (0x57)
One or more parameters are not valid.
2 (0x2)
No per-user audit policy exists for the principal specified by the pSid parameter.


To successfully call this function, the caller must have SeSecurityPrivilege or have AUDIT_QUERY_SYSTEM_POLICY and AUDIT_QUERY_USER_POLICY access on the Audit security object.


Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header ntsecapi.h
Library Advapi32.lib
DLL Advapi32.dll