Come da guida di Flash:

codice:
myWebService = new WebService("http://www.myCompany.com/myService.wsdl");
callback1 = myWebService.getWeather("02451"); 
callback1.onResult = function(result)
{
    //fa qualcosa
}
callback2 = myWebService.getDetailedWeather("02451");
callback2.onResult = function(result)
{
    //fa qualcos'altro
}