Play a wave file (C#)

// play a wave file using PlaySound() from the winmm.dll
// a Windows Application tested with VCS.NET 2003 and SharpDevelop

using System;
using System.Runtime.InteropServices;  // DllImport()
using System.Drawing;
using System.Windows.Forms;

namespace PlayWave1
{
  // description of MainForm.
  public class MainForm : System.Windows.Forms.Form
  {
    private System.Windows.Forms.Button btnPlay;
    private System.Windows.Forms.Button btnStop;
    private System.Windows.Forms.OpenFileDialog openFileDialog1;
    private System.Windows.Forms.Button btnLoadFile;
    public MainForm()
    {
      InitializeComponent();

      openFileDialog1.Title = "Select a Wave Sound File";
      openFileDialog1.Filter = "Wav Files(*.wav)|*.wav";
    }

    public static void Main(string[] args)
    {
      Application.Run(new MainForm());
    }

    #region Windows Forms Designer generated code
    private void InitializeComponent() 
    {
      this.btnLoadFile = new System.Windows.Forms.Button();
      this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
      this.btnStop = new System.Windows.Forms.Button();
      this.btnPlay = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // btnLoadFile
      // 
      this.btnLoadFile.Location = new System.Drawing.Point(24, 16);
      this.btnLoadFile.Name = "btnLoadFile";
      this.btnLoadFile.Size = new System.Drawing.Size(120, 23);
      this.btnLoadFile.TabIndex = 0;
      this.btnLoadFile.Text = "Load File";
      this.btnLoadFile.Click += new System.EventHandler(this.BtnLoadFileClick);
      // 
      // btnStop
      // 
      this.btnStop.Location = new System.Drawing.Point(24, 112);
      this.btnStop.Name = "btnStop";
      this.btnStop.Size = new System.Drawing.Size(128, 23);
      this.btnStop.TabIndex = 2;
      this.btnStop.Text = "Stop";
      this.btnStop.Click += new System.EventHandler(this.BtnStopClick);
      // 
      // btnPlay
      // 
      this.btnPlay.Location = new System.Drawing.Point(24, 64);
      this.btnPlay.Name = "btnPlay";
      this.btnPlay.Size = new System.Drawing.Size(120, 23);
      this.btnPlay.TabIndex = 1;
      this.btnPlay.Text = "Play";
      this.btnPlay.Click += new System.EventHandler(this.BtnPlayClick);
      // 
      // MainForm
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);
      this.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(255)));
      this.ClientSize = new System.Drawing.Size(304, 266);
      this.Controls.Add(this.btnStop);
      this.Controls.Add(this.btnPlay);
      this.Controls.Add(this.btnLoadFile);
      this.Name = "MainForm";
      this.Text = "MainForm";
      this.ResumeLayout(false);
    }
    #endregion

    void BtnLoadFileClick(object sender, System.EventArgs e)
    {
      openFileDialog1.ShowDialog();
    }

    void BtnPlayClick(object sender, System.EventArgs e)
    {
      WSounds ws = new WSounds();
      ws.Play(openFileDialog1.FileName, ws.SND_FILENAME|ws.SND_ASYNC);
    }

    void BtnStopClick(object sender, System.EventArgs e)
    {
      WSounds ws = new WSounds();
      ws.StopPlay();
    }
  }

  public class WSounds
  {
    [DllImport("WinMM.dll")]
    public static extern bool  PlaySound(string fname, int Mod, int flag);

    // these are the SoundFlags we are using here, check mmsystem.h for more
    public int SND_ASYNC    = 0x0001;     // play asynchronously
    public int SND_FILENAME = 0x00020000; // use file name
    public int SND_PURGE    = 0x0040;     // purge non-static events
 
    public void Play(string fname, int SoundFlags)
    {
      PlaySound(fname, 0, SoundFlags);
    }

    public void StopPlay()
    {
      PlaySound(null, 0, SND_PURGE);
    }
  }

}