net cf播放wav

using System;
using System.Runtime.InteropServices;
using System.IO;

namespace DeviceApplication
{
    ///  
    /// Sound 的摘要说明。 
     /// string filename = Path.GetDirectoryName(Assembly.GetExecutingAssembly()
    ///                   .GetName().CodeBase) + @"/aa.wav";
    /// 调用方法：Sound sound = new Sound(filename);
    /// 开始播放   sound.Play(); 停止播放  sound.endPlay();
    public class Sound
    {
        private byte[] m_soundBytes;
        private string m_fileName;

        private enum Flags
        {
            SND_SYNC = 0x0000,  /* play synchronously (default) */
            SND_ASYNC = 0x0001,  /* play asynchronously */
            SND_NODEFAULT = 0x0002,  /* silence (!default) if sound not found */
            SND_MEMORY = 0x0004,  /* pszSound points to a memory file */
            SND_LOOP = 0x0008,  /* loop the sound until next sndPlaySound */
            SND_NOSTOP = 0x0010,  /* don't stop any currently playing sound */
            SND_NOWAIT = 0x00002000, /* don't wait if the driver is busy */
            SND_ALIAS = 0x00010000, /* name is a registry alias */
            SND_ALIAS_ID = 0x00110000, /* alias is a predefined ID */
            SND_FILENAME = 0x00020000, /* name is file name */
            SND_RESOURCE = 0x00040004  /* name is resource name or atom */
        }

        [DllImport("CoreDll.DLL", EntryPoint = "PlaySound", SetLastError = true)]
        private extern static int WCE_PlaySound(string szSound, IntPtr hMod, int flags);

        [DllImport("CoreDll.DLL", EntryPoint = "PlaySound", SetLastError = true)]
        private extern static int WCE_PlaySoundBytes(byte[] szSound, IntPtr hMod, 
                                                     int flags);

        [DllImport("CoreDll.DLL", EntryPoint = "PlaySoundW", SetLastError = true)]
        private extern static int PlaySoundW(string szSound, int hMod, int flags);

        [DllImport("CoreDll.DLL", CharSet = CharSet.Auto)]
        public extern static bool sndPlaySound(string lpszSoundname, uint fuSound);

        [DllImport("coredll")]
        public static extern bool PlaySound(string szSound, IntPtr hMod, int flags);


        public Sound(string fileName)
        {
            m_fileName = fileName;
        }

        public Sound(Stream stream)
        {
            // read the data from the stream 
            m_soundBytes = new byte[stream.Length];
            stream.Read(m_soundBytes, 0, (int)stream.Length);
        }

        /// <summary>
        /// 持续播放
        /// </summary>
        public void Play()
        {
            // if a file name has been registered, call WCE_PlaySound,  
            //  otherwise call WCE_PlaySoundBytes 
            if (m_fileName != null)
                WCE_PlaySound(m_fileName, IntPtr.Zero, 
                          (int)(Flags.SND_ASYNC | Flags.SND_FILENAME | Flags.SND_LOOP));
            else
                WCE_PlaySoundBytes(m_soundBytes, IntPtr.Zero, 
                          (int)(Flags.SND_ASYNC | Flags.SND_MEMORY | Flags.SND_LOOP));
        }

        /// <summary>
        /// 播放一次
        /// </summary>
        public void PlayOnce()
        {
            // if a file name has been registered, call WCE_PlaySound,  
            //  otherwise call WCE_PlaySoundBytes 
            if (m_fileName != null)
                WCE_PlaySound(m_fileName, IntPtr.Zero, 
                      (int)(Flags.SND_ASYNC | Flags.SND_FILENAME | Flags.SND_NOWAIT));
            else
                WCE_PlaySoundBytes(m_soundBytes, IntPtr.Zero, 
                                           (int)(Flags.SND_ASYNC | Flags.SND_MEMORY));
        }

        /// <summary>
        /// 停止播放
        /// </summary>
        public void EndPlay()
        {
            try
            {
                WCE_PlaySoundBytes(null, IntPtr.Zero, 
                         (int)(Flags.SND_SYNC | Flags.SND_MEMORY | Flags.SND_NOWAIT));
            }
            catch (Exception e)
            {
                string str;
                str = e.Message;
            }
        }
    }
}