Scroll/Mouse Wheel

programming flash
1

I am having a difficult time getting the scroll/mouse wheel to work on my actionscript code. If someone could show me what I should do to get the code working that would be very great. This is the code I used:

var yOffset1:Number;
var yMin1:Number = 0;
var yMax1:Number = scrollbar.bar.height - scrollbar.thumb.height;
scrollbar.thumb.addEventListener(MouseEvent.MOUSE_DOWN, thumbDown1);
stage.addEventListener(MouseEvent.MOUSE_UP, thumbUp1);

function thumbDown1(evt:MouseEvent):void {
stage.addEventListener(MouseEvent.MOUSE_MOVE, thumbMove1);
yOffset1 = mouseY - scrollbar.thumb.y;
}
function thumbUp1(evt:MouseEvent):void {
stage.removeEventListener(MouseEvent.MOUSE_MOVE, thumbMove1);
}
function thumbMove1(evt:MouseEvent):void {
scrollbar.thumb.y = mouseY - yOffset1;
if (scrollbar.thumb.y <= yMin1)
scrollbar.thumb.y = yMin1;
if (scrollbar.thumb.y >= yMax1)
scrollbar.thumb.y = yMax1;
var sp:Number = scrollbar.thumb.y / yMax1;
Tweener.addTween(content, {y:(-sp*(txtbtn1.height-maskee.height)), time:1});
evt.updateAfterEvent();
}
}