Example

               Form Design

Code

Namespace for voice

using SpeechLib;
 
namespace TextTospeech
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void btnSpeak_Click(object sender, EventArgs e)
        {
          //creating instance of voice
            SpVoice v = new SpVoice();
         //Setting Rate of voice
            v.Rate = 2;
          //calling speak() method of SpVoice class.
            v.Speak(rtxtSpeech.Text, SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak);
        }
    }
}