MoveFileWithProgress (How to Use it)

Question

Hey Programmers how can I use this code? can someone give me a certain example.? 

[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool CopyFileEx(string lpExistingFileName, string lpNewFileName,
           CopyProgressRoutine lpProgressRoutine, IntPtr lpData, ref Int32 pbCancel,
           CopyFileFlags dwCopyFlags);


        delegate CopyProgressResult CopyProgressRoutine(
        long TotalFileSize,
        long TotalBytesTransferred,
        long StreamSize,
        long StreamBytesTransferred,
        uint dwStreamNumber,
        CopyProgressCallbackReason dwCallbackReason,
        IntPtr hSourceFile,
        IntPtr hDestinationFile,
        IntPtr lpData);


        int pbCancel;


        enum CopyProgressResult : uint
        {
            PROGRESS_CONTINUE = 0,
            PROGRESS_CANCEL = 1,
            PROGRESS_STOP = 2,
            PROGRESS_QUIET = 3
        }


        enum CopyProgressCallbackReason : uint
        {
            CALLBACK_CHUNK_FINISHED = 0x00000000,
            CALLBACK_STREAM_SWITCH = 0x00000001
        }


        [Flags]
        enum CopyFileFlags : uint
        {
            COPY_FILE_FAIL_IF_EXISTS = 0x00000001,
            COPY_FILE_RESTARTABLE = 0x00000002,
            COPY_FILE_OPEN_SOURCE_FOR_WRITE = 0x00000004,
            COPY_FILE_ALLOW_DECRYPTED_DESTINATION = 0x00000008
        }


        private void XCopy(string oldFile, string newFile)
        {
            CopyFileEx(oldFile, newFile, new CopyProgressRoutine(this.CopyProgressHandler), IntPtr.Zero, ref pbCancel, CopyFileFlags.COPY_FILE_RESTARTABLE);




        }


        private CopyProgressResult CopyProgressHandler(long total, long transferred, long streamSize, long StreamByteTrans, uint dwStreamNumber, CopyProgressCallbackReason reason, IntPtr hSourceFile, IntPtr hDestinationFile, IntPtr lpData)
        {
            return CopyProgressResult.PROGRESS_CONTINUE;


        }