How do I record a voice in ASP.NET C# application

[DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
    private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Computer computer = new Computer();
            //computer.Audio.Play("c:\\Mere Bina.mp3", AudioPlayMode.WaitToComplete);
        }

    }

    protected void btnRecord_Click(object sender, EventArgs e)
    {
        // record from microphone
        mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
        mciSendString("record recsound", "", 0, 0);

    }

    protected void btnStop_Click(object sender, EventArgs e)
    {
        // stop and save
        mciSendString("save recsound E:\\Railways\\Sound\\record.wav", "", 0, 0);
        mciSendString("close recsound ", "", 0, 0);
        Computer c = new Computer();
        c.Audio.Stop();


        //mciSendString("save recsound E:\\Railways\\Sound\\record.wav", "", 0, 0);
        //DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".wav", "" , 0, 0);
        //mciSendString("close recsound ", "", 0, 0);
        //Computer c = new Computer();
        //c.Audio.Stop();
    }

    protected void btnRead_Click(object sender, EventArgs e)
    {
        Computer computer = new Computer();
        computer.Audio.Play("E:\\Railways\\Sound\\record.wav", AudioPlayMode.Background);



    }