title: break button_click event when enter pressed
body: <p>Is an easy way to cancel click event when user hit enter on button (instead of mouse click on button?)</p>
  
  <p>i have tried with:</p>
  
  <pre><code>    private void button3_Click(object sender, EventArgs e)
      {
          KeyEventArgs ke = e as KeyEventArgs;
          if (ke != null)
          {
              if (ke.KeyCode == Keys.Enter)
              {
                  return;
              }
  
          }
      }
  </code></pre>
  
  <p>But ke is null</p>