package _class {
    
    import mx.core.UIComponent;
    import mx.containers.Canvas;
    
    public class MenuDeroulant extends Canvas    {
        
        // ===============================================
        //                                              Elements                                                
        // ===============================================
        // test Fond
        private var fond:UIComponent = new UIComponent();
        // test parent
        private var _test:Object = new Object();
        
        public function MenuDeroulant():void {
            
            _test = this.parent;
            
            trace(_test.nbNode);
            
            fond.graphics.beginFill(0xCC0000, 1);
            fond.graphics.drawRect(1, 2, 220, 82);
            fond.graphics.endFill();
            
            fond.x = fond.y = 0;
            
            fond.buttonMode = true;
            
            this.addChild(fond);
            
        }
        
    }
    
}

Alert.show(this.parent.toString());

this.parentApplication

package _class {
    
    import _class.MenuDeroulant;

    import mx.containers.Canvas;
    import mx.core.UIComponent;
    import mx.events.FlexEvent;
    import mx.controls.Label;
    import mx.controls.Image;
    import mx.effects.Resize;
    import mx.events.TweenEvent;
    import mx.effects.Move;
    import mx.effects.Rotate;
    
    import flash.events.MouseEvent;
    
    public class ModuleRecherche extends Canvas    {
        
        // ===============================================
        //                                              Elements                                                
        // ===============================================
        // Bouton Depliant
        private var bouton:UIComponent = new UIComponent();
        // Contour Haut
        private var contourHaut:UIComponent = new UIComponent();
        // Contour Bas
        private var contourBas:UIComponent = new UIComponent();
        // Contour Droit
        private var contourDroit:Canvas = new Canvas();
        // Ligne Pointillé
        private var lignePointille:UIComponent = new UIComponent();
        // Label du titre du module
        private var titreLabel:Label = new Label();
        // Puce Image
        private var puceImage:Image = new Image();
        [b]// Menu Deroulant
        private var DeroulantMenu:MenuDeroulant = new MenuDeroulant();
        [/b]
        // ===============================================
        //                                              Animation
        // ===============================================
        // Animation en hauteur du module de Recherche
        private var animationHeight:Resize = new Resize();
        // Animation du filet bas
        private var animationFiletBas:Move = new Move();
        // Animation du filet droit
        private var animationFiletDroit:Resize = new Resize();
        // Rotaation de la puce
        private var animationPuceRotate:Rotate = new Rotate();
        // Animation de la puce
        private var animationPuceMove:Move = new Move();
        
        // ===============================================
        //                                           Embed Image                                        
        // ===============================================
        [Embed(source='../import/swf/puce.swf')] private var puceModule:Class;
        
        // ===============================================
        //                                         Propriété statique                                        
        // ===============================================
        // Largeur du cartouche
        private static var moduleWidth:Number = new Number(223);
        // Hauteur du cartouche
        private static var moduleHeight:Number = new Number(47);
        // Durée de l'animation
        private static var durationAnimation:Number = new Number(500);
        
        // ===============================================
        //                                     Propriétés dynamique                                    
        // ===============================================
        // Titre du module de recherche
        private var __titre:String = new String();
        // nom du Bindable à surveiller
        private var __critere:Object = new Object();
        // nom des données du fichier XML
        private var __data:Object = new Object();
        
        // ===============================================
        //                                              Propriétés                                      
        // ===============================================
        // Etat du menu deroulant
        private var menuDeroulant:Boolean = new Boolean();
        // Nombre de noeud dans le fichier XML
        public var nbNode:Number = new Number();
        
        // ===============================================
        //                                            Constructeur                                            
        // ===============================================
        public function ModuleRecherche():void {
            
            this.width = moduleWidth;
            this.height = moduleHeight;
            this.horizontalScrollPolicy = "off";
            this.verticalScrollPolicy = "off";
            this.setStyle("backgroundColor", "0xFFFFFF");
            
            menuDeroulant = false;
            
            animationHeight.duration = durationAnimation;
            animationHeight.target = this;
            
            animationFiletBas.duration = durationAnimation;
            animationFiletBas.target = contourBas;
            
            animationFiletDroit.duration = durationAnimation;
            animationFiletDroit.target = contourDroit;
            
            animationPuceRotate.duration = durationAnimation;
            animationPuceRotate.target = puceImage;
            
            animationPuceMove.duration = durationAnimation;
            animationPuceMove.target = puceImage;
            
            createPointLine(1, 1, 2, 0);
            
            bouton.graphics.beginFill(0xFFFFFF,0);
            bouton.graphics.drawRect(0, 0, moduleWidth - 196, moduleHeight);
            bouton.graphics.endFill();
            
            bouton.x = 196;
            
            titreLabel.x = 14;
            titreLabel.y = 13;
            titreLabel.text = "Par agence";
            titreLabel.setStyle("fontSize", "13");
            titreLabel.setStyle("color",0x111111);
            
            contourHaut.graphics.lineStyle(1,0x6D6B6C,1);
            contourHaut.graphics.moveTo(0, 0);
            contourHaut.graphics.lineTo(moduleWidth - 1, 0);
            
            contourDroit.graphics.lineStyle(1,0x6D6B6C,1);
            contourDroit.graphics.moveTo(0, 0);
            contourDroit.graphics.lineTo(0, moduleHeight);
            contourDroit.x = 0;
            contourDroit.y = 0;
            
            contourDroit.setStyle("backgroundColor", 0x6D6B6C);
            contourDroit.x = moduleWidth - 1;
            contourDroit.y = 0;
            contourDroit.width = 1;
            contourDroit.height = moduleHeight;
            
            contourHaut.graphics.lineStyle(1,0x6D6B6C,1);
            contourHaut.graphics.moveTo(196, 0);
            contourHaut.graphics.lineTo(196, moduleHeight);
            
            lignePointille.x = 0;
            lignePointille.y = moduleHeight;
            
            contourBas.graphics.lineStyle(1,0x6D6B6C,1);
            contourBas.graphics.moveTo(moduleWidth - 1, 0);
            contourBas.graphics.lineTo(0, 0);
            
            contourBas.y = moduleHeight;
            
            puceImage.x = 206;
            puceImage.y = moduleHeight - 17;
            puceImage.source = puceModule;
            
            bouton.addEventListener(MouseEvent.CLICK, changementEtat);
            bouton.buttonMode = true;
            
            DeroulantMenu.visible = false;
            DeroulantMenu.x = 0;
            DeroulantMenu.y = moduleHeight;
            
            this.addEventListener(FlexEvent.CREATION_COMPLETE, _createElements);
            
        }
        
        // Ajout des éléments au container
        private function _createElements(event:FlexEvent):void {
            
            this.addChild(DeroulantMenu);
            this.addChild(titreLabel);
            this.addChild(puceImage);
            this.addChild(contourHaut);
            this.addChild(lignePointille);
            this.addChild(contourDroit);
            this.addChild(contourBas);
            this.addChild(bouton);
            
        }
        
        // Création de ligne en pointilé
        private function createPointLine(largeur:Number, hauteur:Number, espaceLargeur:Number, espaceHauteur:Number):void {
            
            for (var j:Number = 0; j < (this.width / espaceLargeur); j++) {
                lignePointille.graphics.beginFill(0x404040, 1)
                lignePointille.graphics.drawRect(j * espaceLargeur, j * espaceHauteur, largeur, hauteur);
                lignePointille.graphics.endFill();
            }
            
        }
        
        private function changementEtat(event:MouseEvent):void {
            
            // Fermeture du menu deroulant
            if (menuDeroulant) {
                
                animationHeight.heightFrom = this.height;
                animationHeight.heightTo = moduleHeight;
                
                animationFiletDroit.heightFrom = moduleHeight + 85;
                animationFiletDroit.heightTo = moduleHeight;
                
                animationFiletBas.yFrom = contourBas.y;
                animationFiletBas.yTo = moduleHeight;
                
                animationPuceRotate.angleFrom = puceImage.rotation;
                animationPuceRotate.angleTo = 0;
                
                animationPuceMove.xFrom = puceImage.x;
                animationPuceMove.yFrom = puceImage.y;
                animationPuceMove.yTo = moduleHeight - 15.5;
                animationPuceMove.xTo = 211.5;
                
                menuDeroulant = false;
            
            // Ouverture du menu deroulant
            } else {
                
                animationHeight.heightFrom = this.height;
                animationHeight.heightTo = moduleHeight + 85;
                
                animationFiletDroit.heightFrom = moduleHeight;
                animationFiletDroit.heightTo = moduleHeight + 85;
                
                animationFiletBas.yFrom = contourBas.y;
                animationFiletBas.yTo = moduleHeight + 85;
                
                animationPuceRotate.angleFrom = puceImage.rotation;
                animationPuceRotate.angleTo = 90;
                
                animationPuceMove.xFrom = puceImage.x;
                animationPuceMove.yFrom = puceImage.y;
                animationPuceMove.yTo = moduleHeight - 16.5;
                animationPuceMove.xTo = 210.5;
                
                menuDeroulant = true;
                
            }
                animationFiletDroit.play();
                animationHeight.play();
                animationFiletBas.play();
                animationPuceRotate.play();
                animationPuceMove.play();
                animationPuceMove.addEventListener(TweenEvent.TWEEN_START, etatMenuDeroulant);
                animationPuceMove.addEventListener(TweenEvent.TWEEN_END, etatMenuDeroulant);
        }
        
        private function etatMenuDeroulant(event:TweenEvent):void {
            if (event.type == "tweenStart") {
                if (menuDeroulant == false) {
                    DeroulantMenu.visible = false;
                }
            } else if (event.type == "tweenEnd") {
                if (menuDeroulant == true) {
                    DeroulantMenu.visible = true;
                }
            }
        }
        
        // Mise à jour du titre
        private function setTitre():void { titreLabel.text =  __titre;     }
        // Mise à jour des critères
        private function setCritere():void { trace(__critere); }
        // Mise à jour des données
        private function setData():void {
            
            nbNode = __data.agences.agence.length;
            
            trace(nbNode);
            
            for (var i:Number = new Number(0); i < nbNode; i++) {
                trace(__data.agences.agence[i].id + " - " + __data.agences.agence[i].nom);                
            }
            
            DeroulantMenu._vince();
        
        }
        
        // ===============================================
        //                                           Getter / Setter
        // ===============================================
        public function set _titre(value:String):void { __titre = value; setTitre(); }
        public function set _critere(value:Object):void { __critere = value; setCritere(); }
        public function set _data(value:Object):void { __data = value; setData(); }
        
    }
    
}

var monObjetParent:MaClassePerso = parent as MaClassePerso;
trace(monObjetParent.maVariablePerso);

trace(this.parent.nbNode);

trace(ModuleRecherche(this.parent).nbNode.toString());