No beh, ho capito quello che intendevi, ti suggerivo di farlo tramite actioscript, ma a te serve proprio ridurre l'alpha dell'intero "involucro" e lasciare visibili il testo e le scrollbar, ho ben capito?
[edit] con questo test ottieni quello che dicevo (devi mettere una textarea in libreria)
Codice PHP:
import fl.controls.TextArea;
var t:TextArea = addChild(new TextArea()) as TextArea;
t.setStyle("upSkin", new MovieClip());
t.setStyle("disableSkin", new MovieClip());
t.setStyle("focusRectSkin", new MovieClip());
t.appendText("Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.\nWhy do we use it?");
t.setSize(300, 200);
t.move(10, 10);