struct RTL_BALANCED_LINKS

typedef struct _RTL_BALANCED_LINKS
{
     PRTL_BALANCED_LINKS Parent;
     PRTL_BALANCED_LINKS LeftChild;
     PRTL_BALANCED_LINKS RightChild;
     CHAR Balance;
     UCHAR Reserved[3];
} RTL_BALANCED_LINKS, *PRTL_BALANCED_LINKS;

Windows Vista Kernel Structures