Flash 8.
filter.distance
Property; a float value that specifies the distance between the filter’s effect and an object, in pixels. Acceptable values are from -255 to 255. This property is defined for Filter objects with a value of "bevelFilter", "dropShadowFilter", "gradientBevelFilter", or "gradientGlowFilter" for the filter.name property.
The following example sets the distance to 10 pixels for the Drop Shadow filters on the selected object(s):
var myFilters = fl.getDocumentDOM().getFilters();
for(i=0; i < myFilters.length; i++){
if(myFilters[i].name == 'dropShadowFilter'){
myFilters[i].distance = 10;
}
}
fl.getDocumentDOM().setFilters(myFilters);