# Reusing reusable classes **URL:** \ **Category:** flash\ **Created:** [April 14, 2009, 8:47am UTC](https://forum.kirupa.com/t/reusing-reusable-classes/286347 "2009-04-14T08:47:47Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![ZappyAd](https://avatars.discourse-cdn.com/v4/letter/z/858c86/32.png) [@ZappyAd](https://forum.kirupa.com/u/ZappyAd)\ **Post date:** [April 14, 2009, 8:47am UTC](https://forum.kirupa.com/t/reusing-reusable-classes/286347/1 "2009-04-14T08:47:47Z")
I am having a real problem with understanding something in flash - it doesn’t work in the way I expect so I figure I have really misunderstood something. What I want: I am creating a bunch of .swf files and in each one I want multiple instances of an object that when you put the mouse over it the object will play its animation a bit and pop up a tool tip. Each object can look different (i.e. be a different bitmap) and animate differently (shake, pop, rotate etc). What I did: I have tried to create a class (myMouseItem) that creates the necessary listeners to handle the animation and pop up the tool tip. I create a library item and attach it to the myMouseItem class. I can then put one instance of this inside my .fla and it works. (I still seem to have to put a myMouseItemInstance.stop() in the actionscript for the scene to get it to stop animating for ever but I can probably live with that) What I can’t figure out: How do I repeat this with multiple objects all with different bitmaps but reusing the underlying class? When I try to add another instance of my library class and edit the bmp it changes all instances. When I try to create another library item with the same underlying base class I get an error saying that I have to choose a unique identifier, so I don’t seem to be able to reuse my .as file. I would have thought this kind of thing is something people do all the time so surely the answer is simple? I just can’t figure it out ☹