onMouseWheel problem

[stalker81]

Hi!
Ive found this code in the help docs of flash:

this.createEmptyMovieClip("line_mc", this.getNextHighestDepth());
line_mc.lineStyle(2, 0xFF0000, 100);
line_mc.moveTo(0, 100);
line_mc.lineTo(0, 0);
line_mc._x = 200;
line_mc._y = 200;

var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta:Number) {
line_mc._rotation += delta;
};
mouseListener.onMouseDown = function() {
trace("Down");
};
Mouse.addListener(mouseListener);

This is great, but what i need is, to be able to
give two numbers, in between the onMouseDonw functions,
and when the line_mc._rotation reaches one of the numbers it stops