Simple MP3 Player

The attached project is a simple MP3 player. The UI looks like following:

Mp3Img.gif
Figure 1.

In the above UI, the Browse button let you browse an MP3 file and plays it.

The source code of the Forum class is listed here:

public partial class Form1 : Form
 {
         OpenFileDialog ofd = new OpenFileDialog();
         StringBuilder buffer = new StringBuilder(128);
         int second;
         int minutes;
         string CommandString;
         [DllImport("winmm.dll")]
         private static extern long mciSendString(string lpstrCommand, StringBuilder lpstrReturnString,
         int uReturnLength, int hwndCallback);
    Public Form1()
    {
         InitializeComponent();
         txtpath.ReadOnly = true;
    } 

    private void btnplay_Click(object sender, EventArgs e)
    {
         if (ofd.FileName == "")
         {
             if (ofd.ShowDialog() == DialogResult.OK)
             {
                 ofd.Filter = "MP3 Files|*.mp3";
                 CommandString = "open " + "\"" + ofd.FileName + "\"" +
" type MPEGVideo alias Mp3File"
;
                         mciSendString(CommandString, null, 0, 0);
                         CommandString = "play Mp3File";
                         mciSendString(CommandString, null, 0, 0);
                         timer1.Enabled = true;
               }
     } 

         else
         {
                CommandString = "play Mp3File";
                mciSendString(CommandString, null, 0, 0); 
               
                timer1.Enabled = true;
         }
 } 

private
void btnpause_Click(object sender, EventArgs e)
 {
     CommandString = "pause mp3file";
     mciSendString(CommandString, null, 0, 0);
 }

 private void btnbrowse_Click(object sender, EventArgs e)
 {
     ofd.Filter = "Mp3 files |*.mp3";
     if (ofd.ShowDialog() == DialogResult.OK)
     {
         txtpath.Text = ofd.FileName;
         CommandString = "close Mp3File";
         mciSendString(CommandString, null, 0, 0);
         timer1.Enabled = false;
         CommandString = "open " + "\"" + ofd.FileName + "\"" + "
 type MPEGVideo alias Mp3File"
;
         mciSendString(CommandString, null, 0, 0);
 }
 } 

     private void timer1_Tick(object sender, EventArgs e)
     {
         CommandString = "Status Mp3File position";
         mciSendString(CommandString, buffer, 128, 0);
         second = int.Parse(buffer.ToString());
         second = second / 1000;
         minutes = second / 60;
         second = second % 60;
         lbltime.Text = minutes.ToString("00") + ":" +
second.ToString("00");
       }
 }

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