seek bar in music player in c#

See more:

C#3.5

I want to creat music player in c#. I seachered in net, I got the solution but after that in that code I want to add seek bar and a lable that will show the time of the song.
The code is like this....

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;

using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace Mithlesh_MP3Player
{
    public partial class Form1 : Form
    {
        [DllImport("winmm.dll")]
        private static extern long mciSendString(string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                FilenameTextbox.Text = openFileDialog1.FileName;

                button3.Enabled = true; //So you dont play no file. lol
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            mciSendString("open \"" + FilenameTextbox.Text + "\" type mpegvideo alias MediaFile", null, 0, IntPtr.Zero);
            mciSendString("play MediaFile", null, 0, IntPtr.Zero);

            button3.Enabled = true;
            button2.Enabled = false;
        }

        private void button3_Click(object sender, EventArgs e)
        {
            mciSendString("close MediaFile", null, 0, IntPtr.Zero);

            button2.Enabled = true;
            button3.Enabled = false;
        }
    }
}

Plz also explain this code..

private static extern long mciSendString(string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);

[edit]Code block added - OriginalGriff[/edit]

thans in advans!