Change the text of a dinamically created TextField clicking a button.

import flash.events.MouseEvent;

/* Create an instance of a TextField */
var Message:TextField = new TextField();


    /* Set text and coordinates */
    Message.text = "Before";
    Message.x=100;
    Message.y=50;


/* Make your textfield visible */
addChild(Message);


/* Create your button */
var Button:MovieClip = new MovieClip();
    Button.graphics.beginFill(0xFF0000);
    Button.graphics.drawRect( 100, 100 ,150,50);
    Button.graphics.endFill();

/* Make your button visible */
addChild(Button);

/* Link the button to ChangeText function */
Button.addEventListener(MouseEvent.CLICK, ChangeText);


/* Create the ChangeText function in order to receive a MouseEvent */
function ChangeText (evt:MouseEvent) {
    /* Set new text */
    Message.text="After";
}