brupp.com

Communicating with a loaded flex application is not intuitive.  SWFLoader lets you load one Flex Application into another Flex Apllication as a SWF file. Once the SWF is loaded you can retrieve the SystemManager (class that manages an application window).

_objLoadedAppSystemManager = SystemManager(_objLoader.content);
trace(_objLoadedAppSystemManager.application) //null

The SystemManager’s ‘application’ property holds the reference to the application loaded. The problem is if you try to access this property once the SWF is loaded (by listening SWFLoader’s COMPLETE or INIT event) you will get null since the loaded ‘application’ didnt get initialized properly. One of the solution is to listen to the SystemManager’s APPLICATION_COMPLETE event.

_objLoadedAppSystemManager.addEventListener(FlexEvent.APPLICATION_COMPLETE, onLoadedAppInit);
...
...
private function onLoadedAppInit(objEvent:FlexEvent):void
{
	_objApplication = (_objLoadedAppSystemManager.application) as Object;
	_objApplication["functionname"](param);
}

Now you would be able to call the function (e.g. “functionname” as shown above). This function should be defined the main application file/class of the loaded application.