UIScrollBar - how? tutorial doesn't work

Question

I don't know what be added to the Flash 8 UIScrollBar
manual's examples, skimpy as it is, but if so, what?
I can't get the example to work. I of course put in a path to
a real text file rather than their URL (helpful, guys).
when I do a test movie, the text appears and scrolls, but no
scrollbar appears.
I even imported the StandardComponents.fla and copied the
ScrollBar assets folder into my library.
nobody said what you are supposed to do after that. I would
be happy to have the default scrollbar.
I even used actionscript to set the scrollbar object's
graphics symbols. nothing.

Answer 1

I have that with this code
// Requires:
// - UIScrollBar component in library
// Create text field.
this.createTextField("txt", 10, 0, 0, 600, 480);
txt.wordWrap = true;
this.createClassObject(mx.controls.UIScrollBar, "sc", 20);
// Set the target text field for the scroll bar.
sc.enabled=true;
sc.visible=true;
sc.setScrollTarget(txt);
//size it to match the text field.
sc.setSize(29, txt._height);
//move it next to the text field.
sc.move(txt._x+txt._width, txt._y);
// Load text to display and define onData handler.
sc.upArrowUpName('uparrow');
sc.upArrowOverName('uparrow');
sc.upArrowDownName('uparrow');
sc.downArrowUpName('downarrow');
sc.downArrowOverName('downarrow');
sc.downArrowDownName('downarrow');
sc.scrollTrackName('track');
sc.scrollTrackOverName('track');
sc.scrollTrackDownName('track');
sc.thumbTopName('thumb');
sc.thumbMiddleName('thumb');
sc.thumbBottomName('thumb');
sc.thumbGripName('thumb');
var my_lv:LoadVars = new LoadVars();
my_lv.onData = function(src:String) {
if (src != undefined) {
txt.text = src;
} else {
txt.text = "Error loading text.";
my_lv.load("
http://www.jesusnjim.com/code/gpl.txt");
but all the customizations to the scrollbar do not work as
advertised. I remember reading that in order to customize a
scrollbar, you must draw each of 30 pieces manually (ugh).
now if only I could scroll graphic buttons. I can't even wrap
my head around that one.