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Method 1: FlashPlayer 7 built in

Flash player 7 for the first time ships with a built in method of using the mousewheel. TextField.mouseWheelEnabled is a Boolean value that indicates whether sets wether the textfield can be scrolled via a mousewheel. By default this value is set totrue so all text fields will scroll unless otherwise instructed. This is a player specific function so even if the movie is published in flash player 6 a preson viewing it with flash player 7 will be able to use a mouse wheel to scroll.

Example 1

Note: Click you must on the movie to set focus.
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To use mousewheel values for things other than textfields we must use the mousewheel listener object and the onMouseWheel. This is NOT a player specific function and as a result it must be published flash player 7.

The code used in the example

mouseListener = new Object();
mouseListener.onMouseWheel = function(delta) {
   clip_mc._xscale += delta;
    clip_mc._yscale += delta;
}
Mouse.addListener(mouseListener);

A new object mouse listener is created a mouse listener is added to it. The mouse listener is then called whenever the mouse wheel mose to scale the movieclip.