Windows 7 Desktop Speech Recognition C#

Question

Hi please help me...

this is my code for  Speech Recognation it's work fine

but i have problem with the speech itself like when i say

"start menu" or something default for Speech Recognation it's open the start menu

and i don't want this in my program ,i need it only to recogize what i wrote to him in the code

just the grammar

 

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Speech.Recognition;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        SpeechRecognizer speechReco = new SpeechRecognizer();

        List<string> grammerList = new List<string>();

        public Form1()

        {

            InitializeComponent();

            this.grammerList.Add("one");

            this.grammerList.Add("two");

            Choices myChoices = new Choices(grammerList.ToArray());

            GrammarBuilder builder = new GrammarBuilder(myChoices);

            Grammar gram = new Grammar(builder);

            speechReco.LoadGrammar(gram);

            gram.Enabled = true;

            speechReco.Enabled = true;

            speechReco.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(speechReco_SpeechRecognized);

        }

        void speechReco_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)

        {

            String speech = e.Result.Text;

            lblSpeech.Text = speech;

        }

    }

}

 thanks