Call a function in the shell SWF from a imported SWF

Question

We have flash set up as a shell to take lesson data from XML
and display it frame by frame.
We import SWF files when the XML tells it to to be displayed
on the frame.
How can I get the imported SWF file to call a function in the
shell....
basically have a button or movie clip in the imported swf
call the "gotoNextFrame()" function in the shell.

Answer 1

We found a "bit" easier way if anyone is interested.. we have
the have an eventlistner added to the loader to assign a event to
the swf file thats imported:
flashLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,
addEventHandlers);
then when its completed, it adds event listeners and calls
our "goNextFrame" function (then clears it when its removed from
the stage):
function addEventHandlers(event:Event):void
var swfMC:MovieClip = event.target.content as MovieClip;
swfMC.addEventListener("NextFrame", goNextFrame);
swfMC.addEventListener("PreviousFrame", goPrevFrame);
swfMC.addEventListener(Event.REMOVED_FROM_STAGE,
clearEventListeners);
Then in the swf file thats to be imported, its real simple:
next_btn.addEventListener(MouseEvent.CLICK, MoveToNextFrame);
prev_btn.addEventListener(MouseEvent.CLICK,
MoveToPreviousFrame);
function MoveToNextFrame(e:MouseEvent):void
dispatchEvent(new Event("NextFrame"));
function MoveToPreviousFrame(e:MouseEvent):void
dispatchEvent(new Event("PreviousFrame"));