How does a loaded swf talk back to the main movie?

Hi,
I'm new to as3 and have troubles finding the right path for
swfs to "talk" to one another.
In my movie, I load an swf "news.swf" into a mc called
container_mc.
At one point I want to swap the "news.swf" to "ueberuns.swf"
via button click in my main movie, but not directly: "news.swf" has
a frame labeled "out", which builds down some elements over appr.
20 frames. In the last frame of "news.swf", I want "news.swf" to
either load the next "ueberuns.swf" into that same container_mc of
my main movie or have my main movie find out that "news.swf" is
through with it's last frame and then throw out "news.swf" and put
"ueberuns.swf" in that container_mc.
I already found out that I address "news.swf" by the
following code:
if (newsLaden.content != null) {
newsLaden.content.gotoAndPlay("out");
where newsLaden is the Loaders name. But how do I get
"news.swf" to reply?
Anyone can help? Thanks a lot!
Cheers, Karl

This is one of the biggest problems of AS3 as communication
between swfs, levels, and nested MCs has taken a completely
different path than the previous 9 versions of Flash. Both Erick's
and TheWabbit's suggestions will work but I sort of follow Erick's
approach as LocalConnection is the perfect fit for .swfs
communicating in the same HTML page not for nested. The key is
defining the timelines of MovieClips in each class when you want to
tell them to do something.
Try tera's example and see if that helps but if you
understand Erick's approach keep going. I just wanted to add that
you have to start thinking about defining the MCs you want to
communicate with in each Object Class file such as:
var _root:MovieClip = new MovieClip(parent);
and then you can always sort of define who you want to talk
to a bit easier.
THIS REALLY REALLY SUCKS for those of us who have been with
Flash since version 2 because they took away one of the best and
easiest things to do (but I'm glad telltarget is gone!! lol). Now I
fear people are going to start throwing everything back into one
LARGE SWF again thereby undoing all the work we in the Flash
community did in the first ten years to define 'best practices'
and_levels definitely was one of them along with an 'actions'
layer. I think Adobe's programmers who joined the Macromedia guys
led the product somewhere it didn't necessarily need to go. The
problem is many didn't know how to use the Flash Community's Best
practices. They were new to Flash.

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