public class SpRecognition

        {

            private static SpRecognition _Instance = null;

            private SpeechLib.ISpeechRecoGrammar isrg;

            private SpeechLib.SpSharedRecoContextClass ssrContex = null;

            private System.Windows.Forms.Control cDisplay;  //fan:用来显示语音转化后的文本

            public System.Windows.Forms.TextBox textbox;   //fan:增加textbox在SpRecognition 类

            public SpRecognition()

            {

                ssrContex = new SpSharedRecoContextClass();

                isrg = ssrContex.CreateGrammar(1);

                SpeechLib._ISpeechRecoContextEvents_RecognitionEventHandler recHandle =

                new _ISpeechRecoContextEvents_RecognitionEventHandler(ContexRecognition);

                ssrContex.Recognition += recHandle;

            }

            public void BeginRec(Control tbResult)

            {

                isrg.DictationSetState(SpeechRuleState.SGDSActive);

                cDisplay = tbResult;

                //cDisplay.Text = "dddddddddd";  测试，可以成功在textbox1那里显示出来



            }

            public static SpRecognition instance()

            {

                if (_Instance == null)