C# Signature:

[DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool LookupPrivilegeValue(string lpSystemName, string lpName,
    out LUID lpLuid);

VB Signature:

Declare Function LookupPrivilegeValue Lib "advapi32.dll" (lpSystemName As String, _
   lpName As String, ByRef lpLuid As LUID) As Boolean

User-Defined Types:

LUID

Use the following symbolic names:

public const string SE_ASSIGNPRIMARYTOKEN_NAME = "SeAssignPrimaryTokenPrivilege";

public const string SE_AUDIT_NAME = "SeAuditPrivilege";

public const string SE_BACKUP_NAME = "SeBackupPrivilege";

public const string SE_CHANGE_NOTIFY_NAME = "SeChangeNotifyPrivilege";

public const string SE_CREATE_GLOBAL_NAME = "SeCreateGlobalPrivilege";

public const string SE_CREATE_PAGEFILE_NAME = "SeCreatePagefilePrivilege";

public const string SE_CREATE_PERMANENT_NAME = "SeCreatePermanentPrivilege";

public const string SE_CREATE_SYMBOLIC_LINK_NAME = "SeCreateSymbolicLinkPrivilege";

public const string SE_CREATE_TOKEN_NAME = "SeCreateTokenPrivilege";

public const string SE_DEBUG_NAME = "SeDebugPrivilege";

public const string SE_ENABLE_DELEGATION_NAME = "SeEnableDelegationPrivilege";

public const string SE_IMPERSONATE_NAME = "SeImpersonatePrivilege";

public const string SE_INC_BASE_PRIORITY_NAME = "SeIncreaseBasePriorityPrivilege";

public const string SE_INCREASE_QUOTA_NAME = "SeIncreaseQuotaPrivilege";

public const string SE_INC_WORKING_SET_NAME = "SeIncreaseWorkingSetPrivilege";

public const string SE_LOAD_DRIVER_NAME = "SeLoadDriverPrivilege";

public const string SE_LOCK_MEMORY_NAME = "SeLockMemoryPrivilege";

public const string SE_MACHINE_ACCOUNT_NAME = "SeMachineAccountPrivilege";

public const string SE_MANAGE_VOLUME_NAME = "SeManageVolumePrivilege";

public const string SE_PROF_SINGLE_PROCESS_NAME = "SeProfileSingleProcessPrivilege";

public const string SE_RELABEL_NAME = "SeRelabelPrivilege";

public const string SE_REMOTE_SHUTDOWN_NAME = "SeRemoteShutdownPrivilege";

public const string SE_RESTORE_NAME = "SeRestorePrivilege";

public const string SE_SECURITY_NAME = "SeSecurityPrivilege";

public const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";

public const string SE_SYNC_AGENT_NAME = "SeSyncAgentPrivilege";

public const string SE_SYSTEM_ENVIRONMENT_NAME = "SeSystemEnvironmentPrivilege";

public const string SE_SYSTEM_PROFILE_NAME = "SeSystemProfilePrivilege";

public const string SE_SYSTEMTIME_NAME = "SeSystemtimePrivilege";

public const string SE_TAKE_OWNERSHIP_NAME = "SeTakeOwnershipPrivilege";

public const string SE_TCB_NAME = "SeTcbPrivilege";

public const string SE_TIME_ZONE_NAME = "SeTimeZonePrivilege";

public const string SE_TRUSTED_CREDMAN_ACCESS_NAME = "SeTrustedCredManAccessPrivilege";

public const string SE_UNDOCK_NAME = "SeUndockPrivilege";

public const string SE_UNSOLICITED_INPUT_NAME = "SeUnsolicitedInputPrivilege";

Notes:

Int64 (or long in C#) could be used instead of LUID.

Tips & Tricks:

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Sample Code:

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Alternative Managed API:

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