typedef struct _TOKEN
{
     TOKEN_SOURCE TokenSource;
     LUID TokenId;
     LUID AuthenticationId;
     LUID ParentTokenId;
     LARGE_INTEGER ExpirationTime;
     PERESOURCE TokenLock;
     LUID ModifiedId;
     SEP_TOKEN_PRIVILEGES Privileges;
     SEP_AUDIT_POLICY AuditPolicy;
     ULONG SessionId;
     ULONG UserAndGroupCount;
     ULONG RestrictedSidCount;
     ULONG VariableLength;
     ULONG DynamicCharged;
     ULONG DynamicAvailable;
     ULONG DefaultOwnerIndex;
     PSID_AND_ATTRIBUTES UserAndGroups;
     PSID_AND_ATTRIBUTES RestrictedSids;
     PVOID PrimaryGroup;
     ULONG * DynamicPart;
     PACL DefaultDacl;
     TOKEN_TYPE TokenType;
     SECURITY_IMPERSONATION_LEVEL ImpersonationLevel;
     ULONG TokenFlags;
     UCHAR TokenInUse;
     ULONG IntegrityLevelIndex;
     ULONG MandatoryPolicy;
     PSECURITY_TOKEN_PROXY_DATA ProxyData;
     PSECURITY_TOKEN_AUDIT_DATA AuditData;
     PSEP_LOGON_SESSION_REFERENCES LogonSession;
     LUID OriginatingLogonSession;
     SID_AND_ATTRIBUTES_HASH SidHash;
     SID_AND_ATTRIBUTES_HASH RestrictedSidHash;
     ULONG VariablePart;
} TOKEN, *PTOKEN;

Windows Vista Kernel Structures