title: AS3 class for a Flash Symbol
body: <p>I am new to Flash, I am trying to create a class for a symbol.</p>
  
  <p>I created a new Flash file, drop a DynamicText, convert this DynamicText to a Symbol called "TextBox1"</p>
  
  <p>Then I created TextBox1.as in the same directory as the .fla I just created.</p>
  
  <pre><code>package
  {
      import flash.display.*;
  
      public class TextBox1 extends MovieClip
      {
  
          public function TextBox1() 
          {
              trace("TextBox constructor");
          }
  
      }
  
  }
  </code></pre>
  
  <p>I ran the Flash file but it doesn't display the message. Did I miss anything?</p>