Min version	2003/XP64	2003/XP64 SP1
Max version	2003/XP64 SP2	7 SP1
x86 offset offset:bitpos	Field Name
0x0000	union __unnamed u1	union <unnamed-tag> u1
0x0004	struct _MMADDRESS_NODE * LeftChild
0x0008	struct _MMADDRESS_NODE * RightChild
0x000C	unsigned long StartingVpn
0x0010	unsigned long EndingVpn