AS3 - ScrollBar

Main.as

public var sb:ScrollBar = new ScrollBar;
public var mcContenido:MovieClip;
public var mcMask:MovieClip;

private function configScroll():void {
	//Config Scroll
	//trace("Configurar Scroll");
	sb.x = 20+mcContenido.x + mcContenido.width;
	sb.y = mcContenido.y;
	sb.height = mcMask.height;
	sb.enabled = true;
	sb.setScrollProperties(mcMask.height, 0, (mcContenido.height-mcMask.height));
	sb.addEventListener(ScrollEvent.SCROLL, scrollMC);
	addChild(sb);
}

private function scrollMC(event:ScrollEvent):void {
	mcContenido.y=-event.position + mcMask.y;
}