Flash Pro CC
Tween.tweenType
Specifies the type of tween. For example, Motion or Shape.
var tweenObj = fl.getDocumentDOM().getTimeline().layers[0].frames[0].tweenObj;
if( tweenObj.tweenType == "shape") {
for(var i = 1; i < tweenObj.duration; i++) {
var shape = tweenObj.getShape(i); ///// code to perform some operation on returned shape } }