SetFilePointer

    static extern unsafe uint SetFilePointer(

    static extern uint SetFilePointer(

    Shared Function SetFilePointer( _

    private static extern int SetFilePointer(IntPtr handle, int lDistanceToMove, out int lpDistanceToMoveHigh, uint dwMoveMethod);

    lo = SetFilePointer(handle, lo, out hi, moveMethod);

static extern bool SetFilePointerEx(IntPtr hFile, long liDistanceToMove,

public static extern bool SetFilePointerEx(

SetFilePointerEx(handle, 0, ptr, FILE_CURRENT);//ptr contains current location of file pointer. handle is a pointer to an open file handle.

If you are passing a System.Threading.NativeOverlapped struct in (for lpOverlapped) then there's no need to also call SetFilePointer or SetFilePointerEx. The offset in the OVERLAPPED structure trumps wherever the file position was previouly set to.

    SetFilePointer hFile, 0, 0, FILE_END