title: Detecting when text in a textbox changes (while typing)
body: <p>The <code>.TextChanged</code> event on a <code>TextBox</code> fires only after the <code>TextBox</code> loses focus. Is there a way to detect every character that is being typed while the user is typing it?</p>
  
  <p>I know the radio button has a similar event called <code>CurrentCellDirtyStateChanged</code> to detect when the button is clicked without having to wait for it to lose focus. I was trying to find something similar for a <code>TextBox</code>.</p>