C#

using System;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Load += new EventHandler(Form1_Load);
        }

        void Form1_Load(object sender, EventArgs e)
        {
            Stream wave = Assembly.GetExecutingAssembly().
                GetManifestResourceStream(
                MethodBase.GetCurrentMethod().
                DeclaringType.Namespace + ".Resources." + "ringin.wav");
            Byte[] waveData = new Byte[wave.Length];
            wave.Read(waveData, 0, (int)wave.Length);
            PlaySound(waveData, IntPtr.Zero, SoundFlags.SND_ASYNC | SoundFlags.SND_MEMORY);
        }

        enum SoundFlags
        {
            SND_SYNC = 0x0000,
            SND_ASYNC = 0x0001,
            SND_MEMORY = 0x0004,
            SND_NODEFAULT = 0x0002,
            SND_LOOP = 0x0008,
            SND_NOSTOP = 0x0010,
            SND_NOWAIT = 0x00002000,
            SND_FILENAME = 0x00020000,
            SND_RESOURCE = 0x00040004
        }

        [DllImport("winmm.dll")]
        static extern bool PlaySound(byte[] pszSound, IntPtr hmod, SoundFlags fdwSound);
    }
}

Yulianto. wrote:

I'm starting to doing it by myself. It isn't as hard as I thought it will be.

using (System.IO.StreamReader sr = new System.IO.StreamReader(@"c:\data.txt"))
{
    sr.BaseStream.Position = 5; // byte number 5 NOT line number 5
    sr.Read(); // to fill the buffer
    MessageBox.Show(sr.ReadLine());
}

string[] lines = System.IO.File.ReadAllLines(@"c:\data.txt");

dataGridView1.SelectedCells = null;

dataGridView1.SelectedRows = null;

DGV.ClearSelection();