how to edit TextField

I was in a bit confuse that how can we edit a textfield…i can display Html text in Text Field,but how to edit  it in runtime…and i got it..below is a sample..

package {
 
 import flash.display.MovieClip;
 import flash.text.TextField;
 import flash.text.TextFieldAutoSize;
 import flash.text.TextFormat;
 import flash.text.TextFieldType;
 

 public class Text extends MovieClip
 {
  public function Text()
  {
   var textField:TextField = new TextField();
   addChild(textField);
   textField.border = true;
   textField.width = 500;
   textField.type = TextFieldType.INPUT;//use TextFieldType.INPUT property to edit it in runtime
  }
 }
}