How to get ANY input from a MIC in c# -

so want able user says mic , process it. know can use this:

choices c = new choices();         c.add("hello test 1 2 three");          grammarbuilder builder = new grammarbuilder();         builder.append(c);          grammar g = new grammar(builder);         g.name = "cmds";         reader.loadgrammar(g);          if (sreco != null)             reader.speechrecognized += new eventhandler<speechrecognizedeventargs>(speechrecognizedcallback);         if (shypoth != null)             reader.speechhypothesized += new eventhandler<speechhypothesizedeventargs>(speechhypothesizedcallback);         if (sdetected != null)             reader.speechdetected += new eventhandler<speechdetectedeventargs>(speechdetectedcallback); 

to words, how user says. i've heard of dictationgrammar can't seem detect voice. can help? code examples alot.

thanks.