How to detect when an audio device has been plugged and unplugged?

    public class Win32 {
    [DllImport("winmm.dll", SetLastError=true)]
    static extern uint waveOutGetNumDevs();

    [DllImport("winmm.dll", SetLastError = true, CharSet = CharSet.Auto)]
    public static extern uint waveOutGetDevCaps(uint hwo,ref WAVEOUTCAPS pwoc,uint cbwoc);

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public struct WAVEOUTCAPS {
        public ushort wMid;
        public ushort wPid;
        public uint vDriverVersion;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string szPname;
        public uint dwFormats;
        public ushort wChannels;
        public ushort wReserved1;
        public uint dwSupport;
    }

    public static string [] GetSoundDevices() {
        uint devices = waveOutGetNumDevs();
        string [] result = new string[devices];
        WAVEOUTCAPS caps = new WAVEOUTCAPS();

        for(uint i = 0; i < devices; i++) {
            waveOutGetDevCaps(i, ref caps, (uint)Marshal.SizeOf(caps));
            result[i] = caps.szPname;
        }
        return result;
    }


}