var cTemp:MaClasse = new MaClasse();

cTemp.appelant = this;

public class MaClasse
{
public MaClasse()
{
public var appelant:Object;
}
}

cTemp.appelant = this;

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
    <![CDATA[
    import URLRequestExample.URLRequestExample;
    import flash.system.Security;
    Security.allowInsecureDomain("*");
    Security.allowDomain("*");
        
     private function test():void
     {
        var urlr : URLRequestExample = new URLRequestExample();
        urlr.appelant = this;
     }
    ]]>
</mx:Script>
    <mx:Panel width="536" height="387" layout="absolute" horizontalCenter="0" verticalCenter="10.5">
        <mx:List x="10" y="104"></mx:List>
        <mx:Label x="10" y="22" text="Liste"/>
        <mx:Button x="180" y="104" label="Requete" click="test()"/>
        <mx:Text x="237" y="78" text="Text" id="txtstatut"/>
        <mx:Label x="180" y="78" text="Status :"/>
    </mx:Panel>
    
</mx:Application>

package URLRequestExample
{
import flash.display.Sprite;
    import flash.events.*;
    import flash.net.*;
    import flash.system.Security;
    import mx.utils.StringUtil;
    Security.allowInsecureDomain("*");
    Security.allowDomain("*");
    
    public class URLRequestExample extends Sprite {

        public var appelant:Object;
        public var statut:String = "";
        public function URLRequestExample() {
            var loader:URLLoader = new URLLoader();
            configureListeners(loader);

            var request:URLRequest = new URLRequest("http://monsite.com/index.php?compteur=1");
            try {
                loader.load(request);
            } catch (error:Error) {
                trace("Unable to load requested document.");
            }
        }

        private function configureListeners(dispatcher:IEventDispatcher):void {
            dispatcher.addEventListener(Event.COMPLETE, completeHandler);
            dispatcher.addEventListener(Event.OPEN, openHandler);
            dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
            dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
            dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler);
            dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
        }

        private function completeHandler(event:Event):void {
            var loader:URLLoader = URLLoader(event.target);
            trace("completeHandlereeeeee: ");
            var chaineretour:String = loader.data;
            var indexstatut:int = chaineretour.search("status='");
            
            if(indexstatut!=-1)
            {
                statut=chaineretour.substr(indexstatut+8,2);
            }
            txtstatut.text = statut;
            trace("Statut de la connec"+statut);
        }
        
        private function openHandler(event:Event):void {
            trace("openHandler: " + event);
        }

        private function progressHandler(event:ProgressEvent):void {
            trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
        }

        private function securityErrorHandler(event:SecurityErrorEvent):void {
            trace("securityErrorHandler: " + event);
        }

        private function httpStatusHandler(event:HTTPStatusEvent):void {
            trace("httpStatusHandler: " + event);
        }

        private function ioErrorHandler(event:IOErrorEvent):void {
            trace("ioErrorHandler: " + event);
        }
    }
}

var urlr : URLRequestExample = new URLRequestExample(this);

public function coucou():void
{
   trace("coucou")
}

private var ap : Application;
public function URLRequestExample(_ap:Application) {
  ap=_ap;
  ap.coucou();
}

private var ap : Application;
        public function URLRequestExample(_ap:Application) {
              ap=_ap;

private function test():void
     {
        var urlr : URLRequestExample = new URLRequestExample(this);
     }

package
{
    import mx.core.Application;
    import mx.controls.TextArea;

    public class TonApplication extends Application
    {
        public function coucou():void
        {
            var ta : TextArea = this.getChildByName("ta") as TextArea;
            ta.text="coucou";    
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<app:TonApplication
    xmlns:mx="http://www.adobe.com/2006/mxml"    
    creationComplete="init();"
    xmlns:app="*"
>
    <mx:Script>
        <![CDATA[
            import mx.controls.Alert;
            private function init():void
            {
                   var test : Test = new Test(this);                    
            }          
          
        ]]>
    </mx:Script>        
    <mx:TextArea id="ta"/>
</app:TonApplication>

package
{
    public class Test
    {
        private var ap : TonApplication;
        public function Test(_ap:TonApplication)
        {
            ap=_ap;    
            ap.coucou();
        }
    }
}

private function init():void
            {
                   var lancer : Test = new Test(this);
                   lancer.checkPlaylist();
                   trace("helo");             
            }

private function checkPlaylist():void
        {
            ap.URLRequestExample("http://monsite.com/index.php?compteur=1");
                    }