ActionScript 3.0 :: Formatting User Input TextField Automatically?

I'm trying to create a user input textfield which automatically applies the defined format on it. The only problem is: actionscript 3 seems to ignore the format and stubbornly applies the default text format. How can I apply the desired format on user typed text? Here's my code so far. As you can see, for experimental reasons I tried to apply the size "60" on the text, but if you execute the script, the size of the text remains unchanged:

PHP Code:
import flash.text.Font;
import flash.text.TextFormat;
import flash.text.TextField;
var theTextField:TextField = new TextField();
var txtFmt:TextFormat = new TextFormat();
[Code] .....