Reusable .as file


I am having a .as file which will be distributed across many movie files. However, when an update has been done in .as file, we will need to recompile all the fla files. In order to avoid this, we need to devise a mechanism (like dll in Microsoft applications) where we can just re-distribute the updated .as file and it will be available righaway to the fla file without the need to recompile it.

Can someone help me and let meknow how this can be achieved?