title: flash simple button with text
body: <p>I have a simple Button in Flash cs5 - as3 called btn1 with a dynamic text called text_txt inside inside it.</p>
  
  <p>The goal is simply to change the text however...</p>
  
  <pre><code>btn1.visible=true; // works fine
  this.btn1.text_txt.text="hello"; // give a NULL error
  </code></pre>
  
  <p><strong>My question is: how to programatically change the text that is inside that button ?</strong></p>