title: How to filter textbox input to numeric only?
body: <p>How do I suppress all data except numeric? </p>
  
  <p>This is not working on <code>KeyDown()</code>:</p>
  
  <pre><code>If e.KeyData &lt; Keys.D0 Or e.KeyData &gt; Keys.D9 Then
      e.Handled = True
  End If
  </code></pre>