ZwReadFile

function ZwReadFile(

  FileHandle: HANDLE;

  Event: HANDLE;

  ApcRoutine: PIO_APC_ROUTINE;

  ApcContext: PVOID;

  IoStatusBlock: PIO_STATUS_BLOCK;

  Buffer: PVOID;

  Length: ULONG;

  ByteOffset: PLARGE_INTEGER;

  Key: PULONG

):NTSTATUS;