ActionScript 2.0 Language Reference - Adobe Help and Support

knockout:Boolean [optional] - Applies a knockout effect (true), which effectively makes the
object's fill transparent and reveals the background color of the document. The default value
is false (no knockout).
Example
The following example instantiates a new BevelFilter and applies it to the MovieClip instance
(rect):
import flash.filters.BevelFilter;
var distance:Number = 5;
var angleInDegrees:Number = 45;
var highlightColor:Number = 0xFFFF00;
var highlightAlpha:Number = 0.8;
var shadowColor:Number = 0x0000FF;
var shadowAlpha:Number = 0.8;
var blurX:Number = 5;
var blurY:Number = 5;
var strength:Number = 5;
var quality:Number = 3;
var type:String = "inner";
var knockout:Boolean = false;
var filter:BevelFilter = new BevelFilter(distance,
angleInDegrees,
highlightColor,
highlightAlpha,
shadowColor,
shadowAlpha,
blurX,
blurY,
strength,
quality,
type,
knockout);
var rect:MovieClip = createRectangle(100, 100, 0x00CC00,
"bevelFilterExample");
rect.filters = new Array(filter);
284 ActionScript classes