typedef struct _TEB
{
     NT_TIB NtTib;
     PVOID EnvironmentPointer;
     CLIENT_ID ClientId;
     PVOID ActiveRpcHandle;
     PVOID ThreadLocalStoragePointer;
     PPEB ProcessEnvironmentBlock;
     ULONG LastErrorValue;
     ULONG CountOfOwnedCriticalSections;
     PVOID CsrClientThread;
     PVOID Win32ThreadInfo;
     ULONG User32Reserved[26];
     ULONG UserReserved[5];
     PVOID WOW32Reserved;
     ULONG CurrentLocale;
     ULONG FpSoftwareStatusRegister;
     VOID * SystemReserved1[54];
     LONG ExceptionCode;
     PACTIVATION_CONTEXT_STACK ActivationContextStackPointer;
     UCHAR SpareBytes1[36];
     ULONG TxFsContext;
     GDI_TEB_BATCH GdiTebBatch;
     CLIENT_ID RealClientId;
     PVOID GdiCachedProcessHandle;
     ULONG GdiClientPID;
     ULONG GdiClientTID;
     PVOID GdiThreadLocalInfo;
     ULONG Win32ClientInfo[62];
     VOID * glDispatchTable[233];
     ULONG glReserved1[29];
     PVOID glReserved2;
     PVOID glSectionInfo;
     PVOID glSection;
     PVOID glTable;
     PVOID glCurrentRC;
     PVOID glContext;
     ULONG LastStatusValue;
     UNICODE_STRING StaticUnicodeString;
     WCHAR StaticUnicodeBuffer[261];
     PVOID DeallocationStack;
     VOID * TlsSlots[64];
     LIST_ENTRY TlsLinks;
     PVOID Vdm;
     PVOID ReservedForNtRpc;
     VOID * DbgSsReserved[2];
     ULONG HardErrorMode;
     VOID * Instrumentation[9];
     GUID ActivityId;
     PVOID SubProcessTag;
     PVOID EtwLocalData;
     PVOID EtwTraceData;
     PVOID WinSockData;
     ULONG GdiBatchCount;
     UCHAR SpareBool0;
     UCHAR SpareBool1;
     UCHAR SpareBool2;
     UCHAR IdealProcessor;
     ULONG GuaranteedStackBytes;
     PVOID ReservedForPerf;
     PVOID ReservedForOle;
     ULONG WaitingOnLoaderLock;
     PVOID SavedPriorityState;
     ULONG SoftPatchPtr1;
     PVOID ThreadPoolData;
     VOID * * TlsExpansionSlots;
     ULONG ImpersonationLocale;
     ULONG IsImpersonating;
     PVOID NlsCache;
     PVOID pShimData;
     ULONG HeapVirtualAffinity;
     PVOID CurrentTransactionHandle;
     PTEB_ACTIVE_FRAME ActiveFrame;
     PVOID FlsData;
     PVOID PreferredLanguages;
     PVOID UserPrefLanguages;
     PVOID MergedPrefLanguages;
     ULONG MuiImpersonation;
     WORD CrossTebFlags;
     ULONG SpareCrossTebBits: 16;
     WORD SameTebFlags;
     ULONG DbgSafeThunkCall: 1;
     ULONG DbgInDebugPrint: 1;
     ULONG DbgHasFiberData: 1;
     ULONG DbgSkipThreadAttach: 1;
     ULONG DbgWerInShipAssertCode: 1;
     ULONG DbgRanProcessInit: 1;
     ULONG DbgClonedThread: 1;
     ULONG DbgSuppressDebugMsg: 1;
     ULONG SpareSameTebBits: 8;
     PVOID TxnScopeEnterCallback;
     PVOID TxnScopeExitCallback;
     PVOID TxnScopeContext;
     ULONG LockCount;
     ULONG ProcessRundown;
     UINT64 LastSwitchTime;
     UINT64 TotalSwitchOutTime;
     LARGE_INTEGER WaitReasonBitMap;
} TEB, *PTEB;

Windows Vista Kernel Structures