C#

SpeechRecognitionEngine rec = new SpeechRecognitionEngine();
            rec.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
            DictationGrammar newgram = new DictationGrammar("grammar:dictation#Spelling");
            rec.LoadGrammar(newgram);
            rec.LoadGrammar(NewGrammar("Greeting", "Hello", "Morning", "Good Day", "Hi", "Sup?","Up"));
            rec.SetInputToDefaultAudioDevice();
            rec.RecognizeAsync(RecognizeMode.Multiple);            
//Used to add custom grammars
        private Grammar NewGrammar(string RuleName, params string[] Phrases)
        {
            Choices GramChoices = new Choices(Phrases);
            GrammarBuilder GramBuild = new GrammarBuilder(GramChoices);
            Grammar Gram = new Grammar(GramBuild);
            Gram.Name = RuleName;
            return Gram;
        }
        void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            //MessageBox.Show(e.Result.Text);
            label1.Text = e.Result.Text;

        }