C# mci SoundRecord / 录音

        private SoundRecord m_Record = new SoundRecord();
        private void MainForm_Load(object sender,EventArgs e)
        {     
            this.m_Record.OpenRecord(); // 打开录音
            this.m_Record.StartRecord(); // 开始录音
        }

        private void BtnStopAndSave_Click(object sender,EventArgs e)
        {           
            this.m_Record.StopRecord(); // 停止录音
            this.m_Record.SaveRecord(@"C:UserswindoDesktop1.wav"); // 保存录音
            this.m_Record.CloseRecord(); // 关闭录音
        }

    public partial class SoundRecord
    {
        [DllImport("WinMm.dll",CharSet = CharSet.Auto,CallingConvention = CallingConvention.Cdecl)]
        private static extern int mciSendString(string lpstrCommand,string lpstrReturnString,int uReturnLength,int hwndCallback);
      
        private const int ERROR_SUCCESS = 0;
        private const string MODE_UNKNOWN = "unknown";

        private static bool mciSendString(string strCommand)
        {
            return mciSendString(strCommand,null,0) != ERROR_SUCCESS;
        }
    }

    public partial class SoundRecord
    {
        private int m_channels;     
        private int m_sample_spersec;
        private string m_format_tag;
        private int m_bits_per_sample;

        public SoundRecord()
        {
            this.Channels = 2;
            this.FormatTag = "pcm";
            this.BitsPerSample = 8;          
            this.SampleSpersec = 11025;       
        }
        // 采样位数
        public virtual int BitsPerSample
        {
            set
            {
                if (mciSendString("set wave bitpersample " + value))
                    this.m_bits_per_sample = value;
            }
            get
            {
                return this.m_bits_per_sample;
            }
        }
        // 采样频率
        public virtual int SampleSpersec
        {
            get
            {
                return this.m_sample_spersec;
            }
            set
            {
                if (mciSendString("set wave samplespersec " + value))
                    this.m_sample_spersec = value;
            }
        }
        // 声道
        public virtual int Channels
        {
            get
            {
                return m_channels;
            }
            set
            {
                if (mciSendString("set wave channels " + value))
                    this.m_channels = value;
            }
        }
        // 格式标签
        public virtual string FormatTag
        {
            get
            {
                return this.m_format_tag;
            }
            set
            {
                if (mciSendString("set wave format tag " + value))
                    this.m_format_tag = value;
            }
        }
        // 打开录音
        public virtual bool OpenRecord()
        {
            return mciSendString("open new type waveaudio alias movie");
        }
        // 开始录音
        public virtual bool StartRecord()
        {
            return mciSendString("record movie");
        }
        // 停止录音
        public virtual bool StopRecord()
        {
            return mciSendString("stop movie");
        }
        // 保存录音
        public virtual bool SaveRecord(string saveFileName)
        {
            return mciSendString("save movie " + saveFileName);
        }
        // 关闭录音
        public virtual bool CloseRecord()
        {
            return mciSendString("close movie");
        }
        // 暂停录音
        public virtual bool PauseRecord()
        {
            return mciSendString("pause movie");
        }
        // 恢复录音
        public virtual bool ResumeRecord()
        {
            return mciSendString("resume movie");
        }
        // 执行状态
        public virtual string Status
        {
            get
            {
                string strBuffer = new string('',12);
                if (mciSendString("status movie mode",strBuffer,12,0) != ERROR_SUCCESS)
                    return MODE_UNKNOWN;
                if ((strBuffer = strBuffer.Remove(strBuffer.IndexOf(''))).Length <= 0)
                    return MODE_UNKNOWN;
                return strBuffer;
            }
        }
    }