[beginner] Reef's AS3.0 Questions

Alright so I’d rather not make 100 threads on beginner questions - thanks for the help beforehand for anyone who answers them. I’ll update this every now and then.

  1. How do I pass in a value to a function when using MouseEvent.CLICK?
package {
	import flash.display.MovieClip;
	import flash.events.MouseEvent;
	public class mcEvent extends MovieClip {
		public var clicky:myBTN = new myBTN;
		public function mcEvent():void {
			clicky.addEventListener(MouseEvent.CLICK, doOnClick, 0.1);
		private function doOnClick(event:MouseEvent, rate:Number):void {
			clicky.alpha -= rate; // doesn't work
  1. Why am I not using onRelease or onRollOver anymore? What’s these “event” things and why are they better?

  2. Why doesn’t my cursorHand show up when using events?
    *My answer:*buttonMode = true; inside the roll over function helps bring the hand cursor up! Please tell me if that’s the proper way to do it.