adding a object to another object in as3 - actionscript-3

Question

Ok so i have a character on the screen and when it moves the camera follows(thanks to manifest222 on youtube) i have a wall where the player cant go through. I also have boxes adding to the stage but i want it so that the box adds to onto another object hers the code.
package {
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.text.TextField;
import flash.display.Stage;
public class Main extends MovieClip {
// player
public var characterEndMC:MovieClip = new charEndMC();
public var arrayOfBarrier:Array = new Array();
//box
private var boxAmount:Number=0;
private var boxLimit:Number=20;
private var _root:Object;
//$txt
public var money:int=0;
public var gold:int=0;
public var my_scrollbar:MakeScrollBar;
//$$
public var testnumber:Number=1;
//enemy1
private var e01Amount:Number=0;
private var e01Limit:Number=2;
public function Main() {
$box.click$.move$.buttonMode=true;
$box.click$.clickmini$.buttonMode=true;
backgroundpic.visible = false;
character_mc["charAngle"]=0;
character_mc["moveX"]=0;
character_mc["moveY"]=0;
character_mc["walkSpeed"]=5;
stage.addEventListener(MouseEvent.CLICK, charMove);
//box add listener
addEventListener(Event.ENTER_FRAME, eFrame);
//moneybox
$box.click$.move$.addEventListener(MouseEvent.MOUSE_DOWN, startmoving$);
$box.click$.move$.addEventListener(MouseEvent.MOUSE_UP, stopmoving$);
$box.click$.clickmini$.addEventListener(MouseEvent.CLICK, c$mini);
my_scrollbar=new MakeScrollBar(scroll_mc,scroll_text);
}
public function charLoop(event:Event) {
if (character_mc.hitTestPoint(character_mc["charEnd"].x,character_mc["charEnd"].y,true)) {
character_mc["moveX"]=0;
character_mc["moveY"]=0;
this.removeChild(character_mc["charEnd"]);
character_mc.removeEventListener(Event.ENTER_FRAME, charLoop);
}
for (var j:int = 0; j < arrayOfBarrier.length; j++) {
if (character_mc.hitTestObject(arrayOfBarrier[j])) {
character_mc.x-=character_mc["moveX"];
character_mc.y-=character_mc["moveY"];
character_mc["moveX"]=0;
character_mc["moveY"]=0;
this.removeChild(character_mc["charEnd"]);
character_mc.removeEventListener(Event.ENTER_FRAME, charLoop);
}
}
for (var i:int = 0; i < this.numChildren; i++) {
this.getChildAt(i).x-=character_mc["moveX"];
this.getChildAt(i).y-=character_mc["moveY"];
}
character_mc.x+=character_mc["moveX"]+.05;
character_mc.y+=character_mc["moveY"]+.05;
}
public function lookAtMouse() {
var characterMC:MovieClip=character_mc;
characterMC["charAngle"] = Math.atan2(this.mouseY - characterMC.y, this.mouseX - characterMC.x) / (Math.PI / 180);
characterMC.rotation=characterMC["charAngle"];
}
public function charMove(event:MouseEvent) {
lookAtMouse();
this.addChild(characterEndMC);
characterEndMC.x=this.mouseX;
characterEndMC.y=this.mouseY;
character_mc["charEnd"]=characterEndMC;
character_mc["charEnd"].visible = false;
character_mc["moveX"]=Math.cos(character_mc["charAngle"]*Math.PI/180)*character_mc["walkSpeed"];
character_mc["moveY"]=Math.sin(character_mc["charAngle"]*Math.PI/180)*character_mc["walkSpeed"];
character_mc.addEventListener(Event.ENTER_FRAME, charLoop);
}
//boxadding
private function eFrame(event:Event):void {
if (boxAmount<boxLimit) {
boxAmount++;
var _box:Box=new Box ;
_box.addEventListener(MouseEvent.CLICK,boxclick);
_box.buttonMode=true;
_box.y=Math.random()* backgroundpic.height;
_box.x=Math.random()* backgroundpic.width;
addChild(_box);
}
if (e01Amount<e01Limit) {
e01Amount++;
var Enemy1: enemy01=new enemy01 ;
Enemy1.addEventListener(MouseEvent.CLICK, en01click);
Enemy1.buttonMode=true;
Enemy1.y=Math.random()*stage.stageHeight;
Enemy1.x=Math.random()*stage.stageWidth;
addChild(Enemy1);
}
}
public function boxclick(event:MouseEvent):void {
var _box:Box=event.currentTarget as Box;
logtxt.appendText("You collected " + testnumber + " boxes" + "\n" );
character_mc["moveX"] = _box.y + 40 + (character_mc.height / 2);
character_mc["moveY"]=_box.x;
logtxt.scrollV=logtxt.maxScrollV;
var randVal$:Number=Math.random();
if (randVal$>=0.49) {
money+=100;
} else if (randVal$ <= 0.50 && randVal$ >= 0.15) {
money+=200;
} else if (randVal$ <= 0.14 && randVal$ >= 0.02) {
gold+=10;
} else if (randVal$ == 0.01) {
money+=200;
gold+=20;
}
testnumber++;
boxAmount--;
$box.box$in.box$insins.Moneytxt.text=String(money);
$box.box$in.box$insins.Goldtxt.text=String(gold);
removeChild(_box);
}
private function startmoving$(event:MouseEvent):void {
$box.startDrag();
}
private function stopmoving$(event:MouseEvent):void {
$box.stopDrag();
}
private function c$mini(event:MouseEvent):void {
$box.click$.move$.visible=false;
$box.box$in.visible=false;
$box.y=200;
$box.x=100;
$box.click$.clickmini$.addEventListener(MouseEvent.CLICK, reclickbox$);
$box.click$.clickmini$.removeEventListener(MouseEvent.CLICK, c$mini);
}
private function reclickbox$(event:MouseEvent):void {
$box.click$.clickmini$.addEventListener(MouseEvent.CLICK, c$mini);
$box.click$.clickmini$.removeEventListener(MouseEvent.CLICK, reclickbox$);
$box.y=70;
$box.x=250;
$box.click$.move$.visible=true;
$box.box$in.visible=true;
}
public function scroll_text( n:Number ) {
logtxt.scrollV = Math.round( ( logtxt.maxScrollV - 1 ) * n ) + 1;
}
public function en01click (event:MouseEvent){
}
}
}

Answer 1

That's:
var _box:Box = new Box();
receivingDisplayObjectInstanceName.addChild(_box);