Passing variable to a loaded movie

Question

Let's say, a movie
loads an external MovieClip,
using a MovieClipLoader, and locks
the root, with code as the
following:
//I'd like to pass this variable
var myVar = "Passed it to Shell";
this.createEmptyMovieClip("Shell",
this.getNextHighestDepth());
var lo:Object = new Object();
lo.onLoadInit = function(target_mc){
target_mc._lockroot = true;
var mcl:MovieClipLoader = new MovieClipLoader();
mcl.addListener(lo);
mcl.loadClip("ExternalMovie.swf", Shell);
//end.
Now, once Shell is loaded, how
do I access myVar?
I tried _parent.myVar, which
doesn't work. (Since Shell has
the _root locked.)
I changed the onLoadInit to
lo.onLoadInit = function(target_mc){
target_mc.myVar = myVar;
target_mc._lockroot = true;
and then tried to access inside
Shell by this.myVar, which still
doesn't work.
I'd appreciate any suggestions.

Answer 1

myVar is defined in the
loading movie. (On the
first line lf the listed
code). Actually, it
is passed to the movie,
which in turn loads
external contents to a
MovieClip named Shell.
So how could myVar be
accessed inside Shell?