typedef struct _HANDLE_TABLE_ENTRY
{
     union
     {
          PVOID Object;
          ULONG ObAttributes;
          PHANDLE_TABLE_ENTRY_INFO InfoTable;
          ULONG Value;
     };
     union
     {
          ULONG GrantedAccess;
          struct
          {
               WORD GrantedAccessIndex;
               WORD CreatorBackTraceIndex;
          };
          LONG NextFreeTableEntry;
     };
} HANDLE_TABLE_ENTRY, *PHANDLE_TABLE_ENTRY;

Windows Vista Kernel Structures