title: c# press keyboard button from button at gui
body: <p>how to press keyboard by clicking button at gui ?
  so when this application is running and  i press button1 from GUI the F1 button at my keyboard pressed to...</p>
  
  <pre><code> private void button1_Click(object sender, EventArgs e)
          {
             //F1 button at my keyboard pressed...
          }
  </code></pre>