SpeechRecognitionEngine escucha = new SpeechRecognitionEngine();

public SpeechRecognitionEngine escucha = new SpeechRecognitionEngine();

case "mis carpetas":
                    speechOn = false;               
                    menuCarpetas = new Modu2.MenuCarpetas();
                    menuCarpetas.Show();
                    escucha.RecognizeAsyncStop();
                    break;

if (speechCarpetas == "cerrar ventana")
            {
                escuchaCarpetas.RecognizeAsyncStop();
     escucha.RecognizeAsync(RecognizeMode.Multiple); (en teoria seria algo asi)
                Close();
            }

string pathDestination = @"C:\Biblioteca AIRH\Comprimidos\";
                ProcessStartInfo p = new ProcessStartInfo();                
                p.FileName = @"Procesos\7z.exe";
                p.Arguments = "a " + pathDestination + targetName+ " @listfile.lst" + " -t7z -mx=9";              
                p.WindowStyle = ProcessWindowStyle.Hidden;
                Process x = Process.Start(p);
...
...

namespace GrabadoraCMD
{
    class Program
    {
        [DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);

        static void Main(string[] args)
        {
            mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
            mciSendString("record recsound", "", 0, 0);
            Console.WriteLine("recording, press Enter to stop and save ...");
            Console.ReadLine();

            mciSendString("save recsound c:\\work\\result.wav", "", 0, 0);
            mciSendString("close recsound ", "", 0, 0);
        }
    }
}

Import System.Runtime.InteropServices namespace

    using System.Diagnostics;  
     using System;  
     using System.Windows.Forms;  
     using System.Collections;  
     using System.Drawing;  
     using Microsoft.VisualBasic;  
     using System.Data;  
     using System.Collections.Generic;  
     using System.Runtime.InteropServices;  

Now, in your code module, create a function named record that will access the winmm.dll

    [DllImport("winmm.dll",EntryPoint="mciSendStringA", ExactSpelling=true, CharSet=CharSet.Ansi, SetLastError=true)]  
    private static extern int record(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);  

For record button for Button1, put this code below

    public void Button1_Click(System.Object sender, System.EventArgs e)  
    {  
       timer1.Enabled = true;  
       timer1.Start();  
       record("open new Type waveaudio Alias recsound", "", 0, 0);   
       record("record recsound", "", 0, 0);   
    }  

The function named record was called here to open a wav audio file that is named as recsound. Then this will record sound as you click the record button. Note: Provide headset with microphone or speaker in your PC or laptop for you to say the words to record.

For save and stop button for Button2, put this code below

    public void Button2_Click(System.Object sender, System.EventArgs e)  
    {  
       timer1.Stop();  
       timer1.Enabled = false;  
       record("save recsound d:\\mic.wav", "", 0, 0);  
       record("close recsound", "", 0, 0);  
    }  

The recsound alias that we initialized in the record button was called here. This button will save the recorded audio file and saved into D directory and will named as mic.wav. Then after saving, we close the recorded sound.

For play button for Button3, put this code below

    public void Button3_Click(System.Object sender, System.EventArgs e)  
    {  
       ms = 0;  
       h = 0;  
       s = 0;  
       m = 0;  
       timer1.Enabled = false;  
       lblhur.Text = "00";  
       lblmin.Text = "00";  
       lblsecond.Text = "00";  
       (new Microsoft.VisualBasic.Devices.Audio()).Play("d:\\mic.wav");  
    }  

We used the Play function in Audio to play the saved file in D Directory, the mic.wav, that we recorded its sound earlier.Click first record, say the words you wanted to say, click the save button, and play it.