_IOP_IRP_EXTENSION

//0x28 bytes (sizeof) struct _IOP_IRP_EXTENSION { union { USHORT ExtensionFlags; //0x0 struct { USHORT Allocated:1; //0x0 USHORT PropagateId:1; //0x0 USHORT TimeStamped:1; //0x0 USHORT SpareBits:13; //0x0 }; }; USHORT TypesAllocated; //0x2 UCHAR GenericExtension[4]; //0x4 VOID* VerifierContext; //0x8 struct _GUID ActivityId; //0x10 union _LARGE_INTEGER Timestamp; //0x20 };