#ifndef _NTPEBTEB_H

/**
 * Thread Environment Block (TEB) structure.
 *
 * This structure contains information about the currently executing thread.
 */
typedef struct _TEB
{
    //
    // Thread Information Block (TIB) contains the thread's stack, base and limit addresses, the current stack pointer, and the exception list.
    //

    NT_TIB NtTib;

    //
    // A pointer to the environment block for the thread.
    //

    PVOID EnvironmentPointer;

    //
    // Client ID for this thread.
    //

    CLIENT_ID ClientId;

    //
    // A handle to an active Remote Procedure Call (RPC) if the thread is currently involved in an RPC operation.
    //

    PVOID ActiveRpcHandle;

    //
    // A pointer to the __declspec(thread) local storage array.
    //

    PVOID ThreadLocalStoragePointer;

    //
    // A pointer to the Process Environment Block (PEB), which contains information about the process.
    //

    PPEB ProcessEnvironmentBlock;

    ULONG LastErrorValue;
    ULONG CountOfOwnedCriticalSections;
    PVOID CsrClientThread;
    PVOID Win32ThreadInfo;
    ULONG User32Reserved[26];
    ULONG UserReserved[5];
    PVOID WOW32Reserved;
    LCID CurrentLocale;
    ULONG FpSoftwareStatusRegister;
    PVOID ReservedForDebuggerInstrumentation[16];
#ifdef _WIN64
    PVOID SystemReserved1[25];

    PVOID HeapFlsData;

    ULONG_PTR RngState[4];
#else
    PVOID SystemReserved1[26];
#endif

    CHAR PlaceholderCompatibilityMode;
    BOOLEAN PlaceholderHydrationAlwaysExplicit;
    CHAR PlaceholderReserved[10];

    ULONG ProxiedProcessId;
    ACTIVATION_CONTEXT_STACK ActivationStack;

    UCHAR WorkingOnBehalfTicket[8];

    NTSTATUS ExceptionCode;

    PACTIVATION_CONTEXT_STACK ActivationContextStackPointer;
    ULONG_PTR InstrumentationCallbackSp;
    ULONG_PTR InstrumentationCallbackPreviousPc;
    ULONG_PTR InstrumentationCallbackPreviousSp;
#ifdef _WIN64
    ULONG TxFsContext;
#endif

    BOOLEAN InstrumentationCallbackDisabled;
#ifdef _WIN64
    BOOLEAN UnalignedLoadStoreExceptions;
#endif
#ifndef _WIN64
    UCHAR SpareBytes[23];
    ULONG TxFsContext;
#endif
    GDI_TEB_BATCH GdiTebBatch;
    CLIENT_ID RealClientId;
    HANDLE GdiCachedProcessHandle;
    ULONG GdiClientPID;
    ULONG GdiClientTID;
    PVOID GdiThreadLocalInfo;
    ULONG_PTR Win32ClientInfo[WIN32_CLIENT_INFO_LENGTH];

    PVOID glDispatchTable[233];
    ULONG_PTR glReserved1[29];
    PVOID glReserved2;
    PVOID glSectionInfo;
    PVOID glSection;
    PVOID glTable;
    PVOID glCurrentRC;
    PVOID glContext;

    NTSTATUS LastStatusValue;

    UNICODE_STRING StaticUnicodeString;
    WCHAR StaticUnicodeBuffer[STATIC_UNICODE_BUFFER_LENGTH];

    PVOID DeallocationStack;

    PVOID TlsSlots[TLS_MINIMUM_AVAILABLE];
    LIST_ENTRY TlsLinks;

    PVOID Vdm;
    PVOID ReservedForNtRpc;
    PVOID DbgSsReserved[2];

    ULONG HardErrorMode;
#ifdef _WIN64
    PVOID Instrumentation[11];
#else
    PVOID Instrumentation[9];
#endif
    GUID ActivityId;

    PVOID SubProcessTag;
    PVOID PerflibData;
    PVOID EtwTraceData;
    PVOID WinSockData;
    ULONG GdiBatchCount;

    union
    {
        PROCESSOR_NUMBER CurrentIdealProcessor;
        ULONG IdealProcessorValue;
        struct
        {
            UCHAR ReservedPad0;
            UCHAR ReservedPad1;
            UCHAR ReservedPad2;
            UCHAR IdealProcessor;
        };
    };

    ULONG GuaranteedStackBytes;
    PVOID ReservedForPerf;
    PVOID ReservedForOle; // tagSOleTlsData
    ULONG WaitingOnLoaderLock;
    PVOID SavedPriorityState;
    ULONG_PTR ReservedForCodeCoverage;
    PVOID ThreadPoolData;
    PVOID *TlsExpansionSlots;
#ifdef _WIN64
    PVOID ChpeV2CpuAreaInfo; // CHPEV2_CPUAREA_INFO // previously DeallocationBStore
    PVOID Unused; // previously BStoreLimit
#endif
    ULONG MuiGeneration;
    ULONG IsImpersonating;
    PVOID NlsCache;
    PVOID pShimData;
    ULONG HeapData;
    HANDLE CurrentTransactionHandle;
    PTEB_ACTIVE_FRAME ActiveFrame;
    PVOID FlsData;

    PVOID PreferredLanguages;
    PVOID UserPrefLanguages;
    PVOID MergedPrefLanguages;
    ULONG MuiImpersonation;

    union
    {
        USHORT CrossTebFlags;
        USHORT SpareCrossTebBits : 16;
    };
    union
    {
        USHORT SameTebFlags;
        struct
        {
            USHORT SafeThunkCall : 1;
            USHORT InDebugPrint : 1;
            USHORT HasFiberData : 1;
            USHORT SkipThreadAttach : 1;
            USHORT WerInShipAssertCode : 1;
            USHORT RanProcessInit : 1;
            USHORT ClonedThread : 1;
            USHORT SuppressDebugMsg : 1;
            USHORT DisableUserStackWalk : 1;
            USHORT RtlExceptionAttached : 1;
            USHORT InitialThread : 1;
            USHORT SessionAware : 1;
            USHORT LoadOwner : 1;
            USHORT LoaderWorker : 1;
            USHORT SkipLoaderInit : 1;
            USHORT SkipFileAPIBrokering : 1;
        };
    };

    PVOID TxnScopeEnterCallback;
    PVOID TxnScopeExitCallback;
    PVOID TxnScopeContext;
    ULONG LockCount;
    LONG WowTebOffset;
    PVOID ResourceRetValue;
    PVOID ReservedForWdf;
    ULONGLONG ReservedForCrt;
    GUID EffectiveContainerId;
    ULONGLONG LastSleepCounter; // Win11
    ULONG SpinCallCount;
    ULONGLONG ExtendedFeatureDisableMask;
    PVOID SchedulerSharedDataSlot; // 24H2
    PVOID HeapWalkContext;
    GROUP_AFFINITY PrimaryGroupAffinity;
    ULONG Rcu[2];
} TEB, *PTEB;

#endif
View code on GitHub