Please help me on this Flash keyboard code?

Question

Heya, today is my first time doing scripting with AS3 and I would like to learn how to create a flash keyboard that will be used in a touchscreen machine. Currently I have given myself some basic feature idea for the keyboard but have not start coding it yet since I'm not familiar with flash, they should be able to switch textboxes and have backspace button, a tab button, a spacebar button. Is anyone willing to show me a tutorial or a sample code for a head start?
EDIT: I have found one AS3 keyboard,the textbox and keyboard are coded out but I need multiple textboxes.How can I drag and drop multiple textbox and keyboard into the screen instead?(because i need to have like 3 textboxes and a keyboard that I can design it, with the coded keyboard, can I change the design/color of the keyboard?) Please click on the link to check it out - http://www.mediafire.com/?31203k62zhs1p2h

Answer 1

Hello,
I have errors in this code if i use the appendText and when I press the button 'A' the letter didn come out in the textbox:
function(){return A.apply(null,[this].concat($A(arguments)))}
function(){return A.apply(null,[this].concat($A(arguments)))}function(){return A.apply(null,[this].concat($A(arguments)))}1119: Access of possibly undefined property txt through a reference with static type flash.text:TextField.
var lastSelected_tf:TextField;
stage.addEventListener(MouseEvent.MOUSE_DOWN,toggleTextbox);
function toggleTextbox(e:MouseEvent):void{
if(stage.focus is TextField){
  var t:TextField = (stage.focus as TextField)
   lastSelected_tf = t;
a_mc.s = "a";
a_mc.addEventListener(MouseEvent.MOUSE_DOWN,keyF);
stage.focus = lastSelected_tf;
function keyF(e:MouseEvent):void{
  lastSelected_tf.text+=MovieClip(e.currentTarget).s;
  //lastSelected_tf.txt=lastSelected_tf.appendText(MovieClip(e.currentTarget).s);
i've uploaded the file, please take a look http://www.mediafire.com/?sf6sm3tb5ue6dni