Flash 4- Web services

Hi,

I am using the Flash 4 beta to connect to web services, my connections are fine and everything works as it should.

I added a call to the web services on a button Click event and noticed I need to somehow wait for the response back from the web services before continue with the click event. How do I wait for the result back from the web services call in a button click event?

I hope I put this in the right forum if not my apologies.

Thanks

David................