typedef struct _RTL_ATOM_TABLE_ENTRY
{
     PRTL_ATOM_TABLE_ENTRY HashLink;
     WORD HandleIndex;
     WORD Atom;
     WORD ReferenceCount;
     UCHAR Flags;
     UCHAR NameLength;
     WCHAR Name[1];
} RTL_ATOM_TABLE_ENTRY, *PRTL_ATOM_TABLE_ENTRY;

Windows Vista Kernel Structures