Accessing instances from a class

Hey guys!

Never really worked with class files like this before, and come to think of it, I don´t even know if it´s possible! Or how it´s possible anyways.

I´ve always used this.addEventListener and so on.

My question is, how do you access movieclips with instance names that is on the timeline in tha .fla you are importing the classfile into?

Is there a way to go, so you could write button_mc.addEventListener inside your .as file and have it access the function you defined in your .as file while the button_mc is inside the .fla?

Thanks in advance

/rundevo