Simple ; referring to another MC... HELP!

Really simple question but I’m really rusty with flash;

I’ve got this setup; One MC with a text box to load external txt into… another MC ontop with a drop down menu to select the title of what is to be loaded…

Basically ; I need to know how to use the following…

on (release) {
	loadText = new loadVars();
	loadText.load("ourartists.txt");
	loadText.onLoad = function(success) {
		if (success) {
			// trace(success);
			newsBox.html = true;
			newsBox.htmlText = this.plass;
		}
	};
}

but to load the data into the ‘newsBox’ on the MC named “CONTENTartists”

I’m sure it’s as simple as doing

CONTENTartists.newsBox.html = true;

or something, but can’t for the life of me even remember what this is called so can’t even search for an answer!!!