Lots of objects sharing same mouseover function

Hello again!

Im trying to use multiple objects in the scene that use the same mouse over event, as the objects are created at runtime so as i cant guarentee how many will exist, its easier and more logical to have 1 event they all call…

Anyway i thought there would be a way to work out whos calling the event, box1,box2 etc… but it doesnt seem to work, i tried event.relatedObject however this comes back as null. So is there some special way to do this, as the adobe documentation doesnt seem to cover this, or do i have to manually to a hit test or something on the event X/Y and the scene box X/Y…