Dispatching new event upon sending request to HTTPService

[flywithoutwings]

hi all..
i've a Services class...which handles the HTTPService requests and responses and faults. Now i want to dispatch a new event whenever i send request to the server...so that i can take custom actions like showing some popup window or disabling certain components...but i'm not able to figure out a way to do it...i'm sure that it is quite simple for most of you..but i'm just not able to figure a way to do it...here is my services class:

package business
{
import mx.controls.Alert;
import mx.managers.CursorManager;
import mx.rpc.AsyncToken;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.http.HTTPService;

import view.Privileges_Form;

    public class Services
    {
        private const ENDPOINT_URL:String = "../getPrivilegeDetails.php";
        private static var servicesLocator:Services;
        private var gateway:HTTPService;
        
        
         public static function getInstance() : Services 
          {
              if ( servicesLocator == null )
              {
                  servicesLocator = new Services();
              }
        
              return servicesLocator;
          }
          
          public function Services()
            {
            
            if ( servicesLocator != null )
             {
                 throw new Error( "Only one Services instance should be instantiated" );    
             }
        Privileges_Form.
    
            gateway=new HTTPService();
            gateway.resultFormat="e4x";
            gateway.url = ENDPOINT_URL;
            gateway.method = "POST";
            gateway.useProxy = false;
            gateway.addEventListener(ResultEvent.RESULT, resultHandler);
               gateway.addEventListener(FaultEvent.FAULT, faultHandler);
         }
          
          public function doRequest(method_name:String, parameters:Object, callback:Function):void
        {
            CursorManager.setBusyCursor();
            
            // add the method to the parameters list
            parameters['method'] = method_name;
        
            gateway.request = parameters;
        
            var call:AsyncToken = gateway.send();
            call.method_name=method_name;
            call.request_params = gateway.request;
        
            call.handler = callback;
        }
         private function resultHandler(e:ResultEvent):void
        {
            CursorManager.removeBusyCursor();
            
            if(e.result.data.elements("error").length()>0)
            {
                errorMessageHandler(e);
            }
            else
            {
                e.token.handler.call(null,e);
            }
               
        } 
        
        private function faultHandler(e:FaultEvent):void
        {
              CursorManager.showCursor();
            var errorMessage:String = "Connection error: " + e.fault.faultString; 
            if (e.fault.faultDetail) 
            { 
                errorMessage += "\n\nAdditional detail: " + e.fault.faultDetail; 
            } 
            Alert.show(errorMessage);
           gateway.cancel(); 
           CursorManager.removeBusyCursor();
        }
        
        private function errorMessageHandler(e:ResultEvent):void
        {
            Alert.show("Error Occured:"+e.result.data.error);
            CursorManager.removeBusyCursor();
        }

    }
} 

the method doRequest calls the HTTPServices send method...so in this method, i want to dispatch a new event and handle it in the main application...
can someone please help me in solving this problem..??
thanks in advance...

[phil'ter design]

Just make sure your class extends EventDispatcher, then you can dispatch events like:

dispatchEvent(new Event("someEvent"));

Or instead of using Event, you can create your own custom event and dispatch that if you need to send additional info.