Recording sound with C# .....Errors in Program .....

[apanimesh061]

This is a program for recording sound from an Audio Input device.
I have taken help from the MSDN website ..... !
I did as they had mentioned ....

//wave.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;

namespace Record
{
    public class wave
    {
        public const uint WAVE_MAPPER = unchecked((uint)(-1));
        public const int CALLBACK_WINDOW = 0x10000;

        private const int WAVERR_BASE = 32;
        private const int MMSYSERR_BASE = 0;

        public enum MMSYSERR : int
        {
            noerror = 0,
            error = (MMSYSERR_BASE + 1),
            bad_device_id = (MMSYSERR_BASE + 2),
            not_enabled = (MMSYSERR_BASE + 3),
            allocated = (MMSYSERR_BASE + 4),
            inval_handle = (MMSYSERR_BASE + 5),
            no_driver = (MMSYSERR_BASE + 6),
            no_mem = (MMSYSERR_BASE + 7),
            not_supported = (MMSYSERR_BASE + 8),
            bad_error_num = (MMSYSERR_BASE + 9),
            inval_flag = (MMSYSERR_BASE + 10),
            inval_param = (MMSYSERR_BASE + 11),
            handle_busy = (MMSYSERR_BASE + 12),
            inval_alias = (MMSYSERR_BASE + 13),
            baddb = (MMSYSERR_BASE + 14),
            key_not_found = (MMSYSERR_BASE + 15),
            read_error = (MMSYSERR_BASE + 16),
            write_error = (MMSYSERR_BASE + 17),
            del_error = (MMSYSERR_BASE + 18),
            val_not_found = (MMSYSERR_BASE + 19),
            no_drive_cb = (MMSYSERR_BASE + 20),
            last_error = (MMSYSERR_BASE + 20)
        }

        public enum WAVERR : int
        {
            none = 0,
            bad_format = (WAVERR_BASE + 1),
            still_playing = (WAVERR_BASE + 2),
            un_prepared = (WAVERR_BASE + 3),
            sync = (WAVERR_BASE + 4),
            last_error = (WAVERR_BASE + 5)
        }


        // Wave file formats !

        public const uint wfi = 0x00000000;  // Invalid Format

        public const uint wf_1m08 = 0x00000001;  //11.025 kHz, Mono,   8-bit
        public const uint wf_1s08 = 0x00000002;  //11.025 kHz, Stereo, 8-bit
        public const uint wf_1m16 = 0x00000004;  //11.025 kHz, Mono,   16-bit
        public const uint wf_1s16 = 0x00000008;  //11.025 kHz, Stereo, 16-bit

        public const uint wf_2m08 = 0x00000010;  //22.050 kHz, Mono,   8-bit
        public const uint wf_2s08 = 0x00000020;  //22.050 kHz, Stereo, 8-bit
        public const uint wf_2m16 = 0x00000040;  //22.050 kHz, Mono,   16-bit
        public const uint wf_2s16 = 0x00000080;  //22.050 kHz, Stereo, 16-bit

        public const uint wf_4m08 = 0x00000100;  //44.100 kHz, Mono,   8-bit
        public const uint wf_4s08 = 0x00000200;  //44.100 kHz, Stereo, 8-bit
        public const uint wf_4m16 = 0x00000400;  //44.100 kHz, Mono,   16-bit
        public const uint wf_4s16 = 0x00000800;  //44.100 kHz, Stereo, 16-bit



        public class WAVEFORMATEX
        {
            protected const int WF_OFFSET_FORMATTAG = 20;
            protected const int WF_OFFSET_CHANNELS = 22;
            protected const int WF_OFFSET_SAMPLESPERSEC = 24;
            protected const int WF_OFFSET_AVGBYTESPERSEC = 28;
            protected const int WF_OFFSET_BLOCKALIGN = 32;
            protected const int WF_OFFSET_BITSPERSAMPLE = 34;

            public const int WF_OFFSET_DATA = 44;

            public ushort wFormatTag = 0;
            public ushort nChannels = 0;
            public uint nSamplesPerSec = 0;
            public uint nAvgBytesPerSec = 0;
            public ushort nBlockAlign = 0;
            public ushort wBitsPerSample = 0;

            public void SeekTo(Stream fs)
            {
                fs.Seek(WF_OFFSET_FORMATTAG, SeekOrigin.Begin);
            }

            public void Skip(Stream fs)
            {
                fs.Seek(WF_OFFSET_DATA, SeekOrigin.Begin);
            }

            public void Read(BinaryReader rdr)
            {
                wFormatTag = rdr.ReadUInt16();
                nChannels = rdr.ReadUInt16();
                nSamplesPerSec = rdr.ReadUInt32();
                nAvgBytesPerSec = rdr.ReadUInt32();
                nBlockAlign = rdr.ReadUInt16();
                wBitsPerSample = rdr.ReadUInt16();

                uint dataId = rdr.ReadUInt32(),
                     dataLength = rdr.ReadUInt32();
            }

            public void Write(BinaryWriter wtr)
            {
                wtr.Write(wFormatTag);
                wtr.Write(nChannels);
                wtr.Write(nSamplesPerSec);
                wtr.Write(nAvgBytesPerSec);
                wtr.Write(nBlockAlign);
                wtr.Write(wBitsPerSample);
            }
        }

        public class WAVEHDR : IDisposable
        {

            public const int whdr_done = 0x00000001;
            public const int whdr_prepared = 0x00000002;
            public const int whdr_inloop = 0x00000004;
            public const int whdr_endloop = 0x00000008;
            public const int whdr_inq = 0x00000010;

            public const int wf_PCM = 1;

            public IntPtr lpData = IntPtr.Zero;
            public uint dwBufferLength = 0;
            public uint dwBytesRecorded = 0;
            public uint dwUser = 0;
            public uint dwFlags = 0;
            public uint dwLoops = 0;
            public IntPtr lpNext = IntPtr.Zero;
            public uint reserved = 0;

            public MMSYSERR Read(BinaryReader rdr, uint readLength, int align)
            {
                uint bufferLength = readLength;

                if (bufferLength % align != 0)
                    bufferLength += (uint)(align - (bufferLength % align));

                dwBufferLength = bufferLength;
                byte[] data = new byte[readLength];
                rdr.Read(data, 0, data.Length);

                if (lpData == IntPtr.Zero)
                    lpData = Memory.LocalAlloc(Memory.LMEM_FIXED, (uint)bufferLength);

                if (lpData == IntPtr.Zero)
                    return MMSYSERR.no_mem;

                Marshal.Copy(data, 0, lpData, data.Length);

                return MMSYSERR.noerror;
            }

            public wave.MMSYSERR Write(BinaryWriter wrtr)
            {
                if (lpData == IntPtr.Zero)
                    return wave.MMSYSERR.no_mem;

                byte[] data = new byte[dwBytesRecorded];
                Marshal.Copy(lpData, data, 0, data.Length);
                wrtr.Write(data);

                return wave.MMSYSERR.noerror;
            }

            public MMSYSERR Init(uint bufferLength, bool init)
            {
                if (lpData != IntPtr.Zero && dwBufferLength < bufferLength)
                {
                    Memory.LocalFree(lpData);
                    lpData = IntPtr.Zero;
                }

                if (lpData == IntPtr.Zero)
                    lpData = Memory.LocalAlloc(Memory.LMEM_FIXED, bufferLength);

                dwBufferLength = bufferLength;

                if (lpData == IntPtr.Zero)
                    return MMSYSERR.no_mem;

                if (init)
                {
                    for (int i = 0; i < bufferLength; i++)
                    {
                        Marshal.WriteByte(lpData, i, 0);
                    }
                }

                return MMSYSERR.noerror;
            }

            public void Dispose()
            {
                if (lpData != IntPtr.Zero)
                    Memory.LocalFree(lpData);
            }
        }
    }
}

In wave_in.cs, I got the following errors .... please help me correct them ...... ! :|

Error 1
The type or namespace name 'WindowsCE' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 4 17 Record

Error 2
The type or namespace name 'Windows' does not exist in the namespace 'System' (are you missing an assembly reference?) C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 9 14 Record

Error 3
The type or namespace name 'MessageWindow' could not be found (are you missing a using directive or an assembly reference?) C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 298 46 Record

Error 4
The type or namespace name 'Message' could not be found (are you missing a using directive or an assembly reference?) C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 312 49 Record

Error 5
The type or namespace name 'MainTest' could not be found (are you missing a using directive or an assembly reference?) C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 506 37 Record

//wave_in.cs
using System;
using System.Runtime.InteropServices;
using System.IO;
using Microsoft.WindowsCE.Forms;
using System.Text;
using System.Threading;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows.Forms;

namespace Record
{

    public class wave_in
    {
        protected class WaveFile : IDisposable
        {

            protected IntPtr m_hwi = IntPtr.Zero;
            protected wave.WAVEFORMATEX m_wfmt = null;
            protected wave.WAVEHDR[] m_whdr = null;
            protected bool m_inited = false;
            protected int m_curBlock;
            protected int m_numBlocks;
            protected uint m_bufferSize;
            protected uint m_maxDataLength;

            public bool Done { get { return !m_recording; } }
            protected bool m_recording = false;


            public wave.MMSYSERR Preload(uint curDevice, IntPtr hwnd, int maxRecordLength_ms, int bufferSize)
            {
                // Do not allow recording to be interrupted
                if (m_recording)
                    return wave.MMSYSERR.error;

                // If this file is already initialized then start over
                if (m_inited)
                {
                    Stop();
                    FreeWaveBuffers();
                }

                // Create an instance of WAVEINCAPS to check if our desired
                // format is supported
                WAVEINCAPS caps = new WAVEINCAPS();
                waveInGetDevCaps(0, caps, caps.Size);
                if ((caps.dwFormats & wave.wf_1s08) == 0)
                    return wave.MMSYSERR.not_supported;

                // Initialize a WAVEFORMATEX structure specifying the desired
                // format
                m_wfmt = new wave.WAVEFORMATEX();
                m_wfmt.wFormatTag = wave.WAVEHDR.wf_PCM;
                m_wfmt.wBitsPerSample = 8;
                m_wfmt.nChannels = 2;
                m_wfmt.nSamplesPerSec = 11025;
                m_wfmt.nAvgBytesPerSec = (uint)(m_wfmt.nSamplesPerSec * m_wfmt.nChannels * (m_wfmt.wBitsPerSample / 8));
                m_wfmt.nBlockAlign = (ushort)(m_wfmt.wBitsPerSample * m_wfmt.nChannels / 8);

                // Attempt to open the specified device with the desired wave format
                wave.MMSYSERR result = waveInOpen(ref m_hwi, curDevice, m_wfmt, hwnd, 0, wave.CALLBACK_WINDOW);
                if (result != wave.MMSYSERR.noerror)
                    return result;

                if (bufferSize == 0)
                    return wave.MMSYSERR.error;

                m_bufferSize = (uint)bufferSize;

                // Force the buffers to align to nBlockAlign
                if (m_bufferSize % m_wfmt.nBlockAlign != 0)
                    m_bufferSize += m_wfmt.nBlockAlign - (m_bufferSize % m_wfmt.nBlockAlign);

                // Determine the number of buffers needed to record the maximum length
                m_maxDataLength = (uint)(m_wfmt.nAvgBytesPerSec * maxRecordLength_ms / 1000);
                m_numBlocks = (int)(m_maxDataLength / m_bufferSize);
                if (m_numBlocks * m_bufferSize < m_maxDataLength)
                    m_numBlocks++;

                // Allocate the list of buffers
                m_whdr = new wave.WAVEHDR[m_numBlocks + 1];

                // Allocate and initialize two buffers to start with
                m_whdr[0] = new wave.WAVEHDR();
                m_whdr[1] = new wave.WAVEHDR();

                result = InitBuffer(0);
                if (result != wave.MMSYSERR.noerror)
                    return result;

                result = InitBuffer(1);
                if (result != wave.MMSYSERR.noerror)
                    return result;

                m_curBlock = 0;
                m_inited = true;

                return wave.MMSYSERR.noerror;
            }


            public void BlockDone()
            {
                m_curBlock++;

                // If the next block is not the padding buffer at the end of the
                // recording then initialize another buffer, otherwise stop recording
                if (m_curBlock < m_numBlocks)
                {
                    InitBuffer(m_curBlock + 1);
                }
                else if (m_curBlock == m_numBlocks)
                {
                    Stop();
                }
            }


            public wave.MMSYSERR InitBuffer(int bufIndex)
            {
                // Determine the size of the buffer to create
                uint writeLength = (uint)m_bufferSize;
                if (bufIndex < m_numBlocks)
                {
                    uint remainingDataLength = (uint)(m_maxDataLength - bufIndex * m_bufferSize);
                    if (m_bufferSize > remainingDataLength)
                        writeLength = remainingDataLength;
                }

                // If the header is not already instanced then instance it
                if (m_whdr[bufIndex] == null)
                    m_whdr[bufIndex] = new wave.WAVEHDR();

                // Allocate memory if not already allocated
                wave.MMSYSERR result = m_whdr[bufIndex].Init(writeLength, false);
                if (result != wave.MMSYSERR.noerror)
                    return result;

                // Prepare the header
                result = waveInPrepareHeader(m_hwi, m_whdr[bufIndex], (uint)Marshal.SizeOf(m_whdr[bufIndex]));
                if (result != wave.MMSYSERR.noerror)
                    return result;

                // Put the buffer in the queue
                return waveInAddBuffer(m_hwi, m_whdr[bufIndex], (uint)Marshal.SizeOf(m_whdr[bufIndex]));
            }


            public wave.MMSYSERR Start()
            {
                if (!m_inited || m_recording)
                    return wave.MMSYSERR.error;

                wave.MMSYSERR result = waveInStart(m_hwi);
                if (result != wave.MMSYSERR.noerror)
                    return result;

                m_recording = true;

                return wave.MMSYSERR.noerror;
            }


            private void FreeWaveBuffers()
            {
                m_inited = false;

                if (m_whdr != null)
                {
                    for (int i = 0; i < m_whdr.Length; i++)
                    {
                        if (m_whdr[i] != null)
                        {
                            waveInUnprepareHeader(m_hwi, m_whdr[i], (uint)Marshal.SizeOf(m_whdr[i]));

                            m_whdr[i].Dispose();
                            m_whdr[i] = null;
                        }
                    }

                    m_whdr = null;
                }

                waveInClose(m_hwi);

                m_hwi = IntPtr.Zero;
            }


            private void WriteChars(BinaryWriter wrtr, string text)
            {
                for (int i = 0; i < text.Length; i++)
                {
                    char c = (char)text[i];
                    wrtr.Write(c);
                }
            }


            public wave.MMSYSERR Save(string fileName)
            {
                if (!m_inited)
                    return wave.MMSYSERR.error;

                if (m_recording)
                    Stop();

                FileStream strm = null;
                BinaryWriter wrtr = null;

                try
                {
                    if (File.Exists(fileName))
                    {
                        FileInfo fi = new FileInfo(fileName);
                        if ((fi.Attributes & FileAttributes.ReadOnly) != 0)
                            fi.Attributes -= FileAttributes.ReadOnly;

                        strm = new FileStream(fileName, FileMode.Truncate);
                    }
                    else
                    {
                        strm = new FileStream(fileName, FileMode.Create);
                    }

                    if (strm == null)
                        return wave.MMSYSERR.error;

                    wrtr = new BinaryWriter(strm);
                    if (wrtr == null)
                        return wave.MMSYSERR.error;

                    // Determine the size of the data, as the total number of bytes
                    // recorded by each buffer
                    uint totalSize = 0;
                    for (int i = 0; i < m_numBlocks; i++)
                    {
                        if (m_whdr[i] != null)
                            totalSize += m_whdr[i].dwBytesRecorded;
                    }

                    int chunkSize = (int)(36 + totalSize);

                    // Write out the header information
                    WriteChars(wrtr, "RIFF");
                    wrtr.Write(chunkSize);
                    WriteChars(wrtr, "WAVEfmt ");
                    wrtr.Write((int)16);
                    m_wfmt.Write(wrtr);
                    WriteChars(wrtr, "data");
                    wrtr.Write((int)totalSize);

                    // Write the data recorded to each buffer
                    for (int i = 0; i < m_numBlocks; i++)
                    {
                        if (m_whdr[i] != null)
                        {
                            wave.MMSYSERR result = m_whdr[i].Write(wrtr);
                            if (result != wave.MMSYSERR.noerror)
                                return result;
                        }
                    }

                    return wave.MMSYSERR.noerror;
                }
                finally
                {
                    FreeWaveBuffers();

                    if (strm != null)
                        strm.Close();

                    if (wrtr != null)
                        wrtr.Close();
                }
            }


            public void Stop()
            {
                waveInReset(m_hwi);

                m_recording = false;
            }


            public void Dispose()
            {
                Stop();

                FreeWaveBuffers();
            }
        }


        protected class SoundMessageWindow : MessageWindow
        {
            public const int MM_WIM_OPEN = 0x3BE;
            public const int MM_WIM_CLOSE = 0x3BF;
            public const int MM_WIM_DATA = 0x3C0;

            // Instance of a recording interface
            protected wave_in m_wi = null;

            public SoundMessageWindow(wave_in wi)
            {
                m_wi = wi;
            }

            protected override void WndProc(ref Message msg)
            {
                switch (msg.Msg)
                {
                    // When this message is encountered, a block is
                    // done recording, so notify the WaveIn instance.
                    case MM_WIM_DATA:
                        {
                            if (m_wi != null)
                                m_wi.BlockDone();
                        }
                        break;
                }
                base.WndProc(ref msg);
            }
        }


        protected SoundMessageWindow m_msgWindow = null;


        protected WaveFile m_file = null;


        public wave_in()
        {
            //m_msgWindow = new SoundMessageWindow(this);
            m_file = new WaveFile();
        }


        public uint NumDevices()
        {
            return (uint)waveInGetNumDevs();
        }


        public wave.MMSYSERR GetDeviceName(uint deviceId, ref string prodName)
        {
            WAVEINCAPS caps = new WAVEINCAPS();
            wave.MMSYSERR result = waveInGetDevCaps(deviceId, caps, caps.Size);
            if (result != wave.MMSYSERR.noerror)
                return result;

            prodName = caps.szPname;

            return wave.MMSYSERR.noerror;
        }


        public void BlockDone()
        {
            m_file.BlockDone();
        }


        public wave.MMSYSERR Preload(int maxRecordLength_ms, int bufferSize)
        {
            if (m_file != null)
                return m_file.Preload(0, m_msgWindow.Hwnd, maxRecordLength_ms, bufferSize);

            return wave.MMSYSERR.noerror;
        }


        public void Stop()
        {
            if (m_file != null)
                m_file.Stop();
        }


        public wave.MMSYSERR Start()
        {
            if (m_file != null)
                return m_file.Start();

            return wave.MMSYSERR.noerror;
        }


        public bool Done()
        {
            return m_file.Done;
        }


        public wave.MMSYSERR Save(string fileName)
        {
            if (m_file != null)
                return m_file.Save(fileName);

            return wave.MMSYSERR.noerror;
        }


        public void Dispose()
        {
            m_msgWindow.Dispose();

            if (m_file != null)
                m_file.Dispose();
        }


        [DllImport("coredll.dll")]
        protected static extern int waveInGetNumDevs();



        [DllImport("coredll.dll")]
        private static extern wave.MMSYSERR waveInOpen(ref IntPtr phwi, uint uDeviceID, wave.WAVEFORMATEX pwfx, IntPtr dwCallback, uint dwInstance, uint fdwOpen);


        [DllImport("coredll.dll")]
        private static extern wave.MMSYSERR waveInPrepareHeader(IntPtr hwi, wave.WAVEHDR pwh, uint cbwh);


        [DllImport("coredll.dll")]
        private static extern wave.MMSYSERR waveInUnprepareHeader(IntPtr hwi, wave.WAVEHDR pwh, uint cbwh);


        [DllImport("coredll.dll")]
        protected static extern wave.MMSYSERR waveInClose(IntPtr hwi);


        [DllImport("coredll.dll")]
        protected static extern wave.MMSYSERR waveInReset(IntPtr hwi);


        [DllImport("coredll.dll")]
        protected static extern wave.MMSYSERR waveInStart(IntPtr hwi);


        [DllImport("coredll.dll")]
        protected static extern wave.MMSYSERR waveInStop(IntPtr hwi);


        [DllImport("coredll.dll")]
        private static extern wave.MMSYSERR waveInAddBuffer(IntPtr hwi, wave.WAVEHDR pwh, uint cbwh);


        protected class WAVEINCAPS
        {
            const uint WAVEINCAPS_SIZE = 80;

            private byte[] m_data = null;
            public uint Size { get { return (uint)WAVEINCAPS_SIZE; } }


            public ushort wMid { get { return BitConverter.ToUInt16(m_data, 0); } }

            public ushort wPid { get { return BitConverter.ToUInt16(m_data, 2); } }

            public uint vDriverVersion { get { return BitConverter.ToUInt32(m_data, 4); } }

            public uint dwFormats { get { return BitConverter.ToUInt32(m_data, 72); } }

            public ushort wChannels { get { return BitConverter.ToUInt16(m_data, 76); } }

            public ushort wReserved1 { get { return BitConverter.ToUInt16(m_data, 78); } }


            public string szPname
            {
                get
                {
                    char[] bytes = new char[32];
                    for (int i = 0; i < 32; i++)
                    {
                        bytes[i] = (char)BitConverter.ToUInt16(m_data, i * 2 + 8);
                    }

                    return new string(bytes);
                }
            }

            public WAVEINCAPS()
            {
                m_data = new byte[WAVEINCAPS_SIZE];
            }

            public static implicit operator byte[](WAVEINCAPS caps)
            {
                return caps.m_data;
            }

        }


        [DllImport("coredll.dll")]
        protected static extern wave.MMSYSERR waveInGetDevCaps(uint uDeviceID, byte[] pwic, uint cbwic);


        public static void TestProc(MainTest.DisplayLineDelegate showLine)
        {
            wave_in wi = null;
            try
            {
                wi = new wave_in();

                uint numDevices = wi.NumDevices();
                if (numDevices < 1)
                {
                    showLine("FAILURE: No valid sound drivers detected");
                    return;
                }

                showLine(string.Format("{0} device{1} detected:", numDevices, numDevices != 1 ? "s" : ""));
                for (uint i = 0; i < numDevices; i++)
                {
                    string prodName = "";
                    if (wave.MMSYSERR.noerror != wi.GetDeviceName(i, ref prodName))
                    {
                        showLine(string.Format(" {0}: Failed to get name", i));
                    }
                    else
                    {
                        showLine(string.Format(" {0}: {1}", i, prodName));
                    }
                }


                showLine("Setting max time to 3 seconds");
                showLine("Using 256KB buffers");
                if (wave.MMSYSERR.noerror != wi.Preload(3000, 256 * 1024))
                {
                    showLine("FAILURE: Failed to preload buffers");
                }

                showLine("Starting recording...");
                if (wave.MMSYSERR.noerror != wi.Start())
                {
                    showLine("FAILURE: Failed to start recording");
                }

                showLine("Waiting for 2 seconds...");
                Thread.Sleep(2000);

                showLine("Stopping recording early");
                wi.Stop();

                String fileName = System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase;
                fileName = Path.GetDirectoryName(fileName);
                fileName = Path.Combine(fileName, "test.wav");
                showLine("Saving file test.wav");
                if (wave.MMSYSERR.noerror != wi.Save(fileName))
                {
                    showLine("FAILURE: Failed to save file");
                }
            }
            finally
            {
                if (wi != null)
                    wi.Dispose();
            }
        }
    }
}

[abelLazm]

Have you added Microsoft.WindowsCE.Forms.dll in you project?

[apanimesh061]

I guesss not ..... !
How do I do that and where should I include that ..... ??
:O

[abelLazm]

download it from here and paste it in your debug folder then in the solution explorer there are references right click on that and then click on add references now a dialogue box will open with different tabs in that open project and select your desired dll

[apanimesh061]

Now that I have included both the missing dlls I am still getting a few errors .....
I don't know why this 'Memory' is giving problems ....I don't find any reason .. !
:(

Error 1 The name 'Memory' does not exist in the current context C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave.cs 160 30 Record

Error 2 The name 'Memory' does not exist in the current context C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave.cs 160 48 Record

Error 3 The name 'Memory' does not exist in the current context C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave.cs 186 21 Record

Error 4 The name 'Memory' does not exist in the current context C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave.cs 191 30 Record

Error 5 The name 'Memory' does not exist in the current context C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave.cs 191 48 Record

Error 6 The name 'Memory' does not exist in the current context C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave.cs 212 21 Record

Error 7 The best overloaded method match for 'Microsoft.WindowsCE.Forms.MessageWindow.WndProc(ref Microsoft.WindowsCE.Forms.Message)' has some invalid arguments C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 325 17 Record

Error 8 Argument '1': cannot convert from 'ref System.Windows.Forms.Message' to 'ref Microsoft.WindowsCE.Forms.Message' C:\Users\User\Documents\Visual Studio 2008\Projects\Record\Record\wave_in.cs 325 34 Record