public static extern int WriteFileGather(SafeFileHandle hFile, [In] ref FILE_SEGMENT_ELEMENT[] aSegmentArray,
uint nNumberOfBytesToWrite, IntPtr lpReserved, ref OVERLAPPED lpOverlapped);
public static extern int WriteFileEx(SafeFileHandle hFile, IntPtr lpBuffer, uint nNumberOfBytesToWrite,
ref OVERLAPPED lpOverlapped, FileIOCompletionRoutine lpCompletionRoutine);
public static extern bool ReadFile(SafeFileHandle hFile,
IntPtr lpBuffer, uint nNumberOfBytesToRead,
IntPtr lpNumberOfBytesRead, ref OVERLAPPED lpOverlapped);
public static extern Int32 ReadFile(SafeFileHandle hFile,
ref Byte lpBuffer, Int32 nNumberOfBytesToRead,
ref Int32 lpNumberOfBytesRead,
ref OVERLAPPED lpOverlapped);
public static extern bool UnlockFileEx(SafeFileHandle hFile, uint dwReserved, uint nNumberOfBytesToUnlockLow, uint nNumberOfBytesToUnlockHigh, ref OVERLAPPED lpOverlapped);