winForm 声音如何实现
想要实现类似於QQ一样,有消息來时,便有预设的声音发出,如何实现   
 注:是vs2003.
------解决方案--------------------INVOKE API
------解决方案--------------------using System; 
 using System.Runtime.InteropServices;   
 public class SoundPlayer 
 { 
     public SoundPlayer() 
     { 
     } 
     [DllImport( "winmm.dll ")] 
     private static extern long sndPlaySound(string lpszSoundName, long uFlags);   
     public static void PlaySound(string fileName) 
     { 
         sndPlaySound(fileName, 1); 
     } 
 }
------解决方案--------------------用循环监控貌似有点笨。哈哈
------解决方案--------------------除了API,没有更好的法子 
------解决方案--------------------API函数 
 [DllImport( "winmm.dll ",  EntryPoint= "PlaySound ")]   
 		public  static  extern  int  PlaySound  (   
 			string  lpszName,   
 			int  hModule,   
 			int  dwFlags   
 			);
------解决方案--------------------using System.Media;   
 private void button1_Click(object sender, EventArgs e) 
 { 
     //通过文件播放 
     SoundPlayer vSoundPlayer = new SoundPlayer(); 
     vSoundPlayer.Stream = new FileStream(@ "C:\WINDOWS\Media\chord.wav ", 
         FileMode.Open, FileAccess.Read); 
     vSoundPlayer.Play(); 
 }
------解决方案--------------------获取事件 
 然后调用API 播放声音文件。
------解决方案--------------------using System.Media;   
 private void button1_Click(object sender, EventArgs e) 
 { 
     //通过文件播放 
     SoundPlayer vSoundPlayer = new SoundPlayer(); 
     vSoundPlayer.Stream = new FileStream(@ "C:\WINDOWS\Media\chord.wav ", 
         FileMode.Open, FileAccess.Read); 
     vSoundPlayer.Play(); 
 }     
 这个方法可行。你可以试试。
------解决方案--------------------vs2005下可用 
 using System.Media;   
 private void button1_Click(object sender, EventArgs e) 
 { 
     SoundPlayer vSoundPlayer = new SoundPlayer(); 
     vSoundPlayer.Stream = new FileStream(@ "C:\WINDOWS\Media\chord.wav ", 
         FileMode.Open, FileAccess.Read); 
     vSoundPlayer.Play(); 
 } 
 vs2003下只能用api了
------解决方案--------------------源代码如下(全部)(自己实现的播放声音类):   
 public sealed class wavPlayer 
     { 
         [DllImport( "Winmm ")] 
         public static extern bool PlaySound(string pszSound, IntPtr hmod, UInt32 
         fdwSound); 
         private const Int32 m_SND_ASYNC = 1; 
         private const Int32 m_SND_LOOP = 8; 
         private const Int32 m_SND_FILENAME = 131072; 
         private static string m_PathSoundFile = string.Empty; 
         private static bool m_State = false;   
         public static bool PlayState 
         { 
             set 
             { 
                 m_State = value; 
             } 
             get 
             { 
                 return m_State; 
             } 
         }   
         public static void InitSound() 
         { 
             string soundFile = ConfigurationManager.AppSettings[ "SoundFile "].ToString();   
             if (soundFile ==  " ")