typedef struct _FAST_IO_DISPATCH
{
     ULONG SizeOfFastIoDispatch;
     UCHAR * FastIoCheckIfPossible;
     UCHAR * FastIoRead;
     UCHAR * FastIoWrite;
     UCHAR * FastIoQueryBasicInfo;
     UCHAR * FastIoQueryStandardInfo;
     UCHAR * FastIoLock;
     UCHAR * FastIoUnlockSingle;
     UCHAR * FastIoUnlockAll;
     UCHAR * FastIoUnlockAllByKey;
     UCHAR * FastIoDeviceControl;
     PVOID AcquireFileForNtCreateSection;
     PVOID ReleaseFileForNtCreateSection;
     PVOID FastIoDetachDevice;
     UCHAR * FastIoQueryNetworkOpenInfo;
     LONG * AcquireForModWrite;
     UCHAR * MdlRead;
     UCHAR * MdlReadComplete;
     UCHAR * PrepareMdlWrite;
     UCHAR * MdlWriteComplete;
     UCHAR * FastIoReadCompressed;
     UCHAR * FastIoWriteCompressed;
     UCHAR * MdlReadCompleteCompressed;
     UCHAR * MdlWriteCompleteCompressed;
     UCHAR * FastIoQueryOpen;
     LONG * ReleaseForModWrite;
     LONG * AcquireForCcFlush;
     LONG * ReleaseForCcFlush;
} FAST_IO_DISPATCH, *PFAST_IO_DISPATCH;

Windows Vista Kernel Structures