Dynamic Text In Action Script 3.0

var myTextField:TextField = new TextField  ;
addChild(myTextField);

myTextField.text = "lkasdjf lksdajf lksdafjsd alkfjsdalk fsdklajflk sdajfl; kjsdaf";
myTextField.x = stage.stageWidth/2;
myTextField.y = stage.stageHeight/2;
myTextField.selectable = false;
myTextField.border = false;
myTextField.autoSize = TextFieldAutoSize.CENTER;

var myFormat:TextFormat = new TextFormat  ;
myFormat.color = 0x000000;
myFormat.size = 24;
myFormat.leftMargin = 3;
myFormat.rightMargin = 3;
myTextField.setTextFormat(myFormat);