Min version	XP	2003/XP64 SP1
Max version	2003/XP64 SP2	10 TH2
x86 offset offset:bitpos	Field Name
0x0000	int16_t Type
0x0002	uint16_t Size
0x0004	struct _MDL * MdlAddress
0x0008	unsigned long Flags
0x000C	union __unnamed AssociatedIrp	union <unnamed-tag> AssociatedIrp
0x0010	struct _LIST_ENTRY ThreadListEntry
0x0018	struct _IO_STATUS_BLOCK IoStatus
0x0020	char RequestorMode
0x0021	uint8_t PendingReturned
0x0022	char StackCount
0x0023	char CurrentLocation
0x0024	uint8_t Cancel
0x0025	uint8_t CancelIrql
0x0026	char ApcEnvironment
0x0027	uint8_t AllocationFlags
0x0028	struct _IO_STATUS_BLOCK * UserIosb
0x002C	struct _KEVENT * UserEvent
0x0030	union __unnamed Overlay	union <unnamed-tag> Overlay
0x0038	function * CancelRoutine
0x003C	void * UserBuffer
0x0040	union __unnamed Tail	union <unnamed-tag> Tail