actionscript3:テキストフィールド使用

var myTextBox:TextField = new TextField();
var myText:String = "Hello World";

addChild(myTextBox);
myTextBox.text = myText;

http://livedocs.adobe.com/flash/9.0_jp/main/wwhelp/wwhimpl/js/html/wwhelp.htm?href=00000036.html#wp718637