Simple AS3 irritating me

1

Hi,

I have a really small problem, but I’m curious as to why it occurs. Allow me to shared my frustration here.

I have a folder “Source”. In it, I have an swf “Test.swf” and another folder “code”. In the “code” folder, I have an as file “Zoo.as”.

The “Zoo.as” contains this code:


package zoo{
    public class VirtualZoo {
        public function VirtualZoo() {
        }
    }
}

Now, in the Test.fla, in the Document Class, I have entered code.Zoo

On compile, it throws me this error :

5000: The class ‘code.Zoo’ must subclass ‘flash.display.MovieClip’ since it is linked to a library symbol of that type.

When I alter the code to what is shown below, it works fine :


package zoo{
    import flash.display.MovieClip;
    public class VirtualZoo extends MovieClip {
        public function VirtualZoo() {
        }
    }
}

I don’t understand why I need to import the MovieClip though, I haven’t used a MovieClip anywhere. Can someone please help me understand whats going on?

Thanks a lot! I know it’s a really basic question, but instead of just finding the solution as I did, I want to understand why! Why that’s the solution. Thanks again.