I'm signed up, I've downloaded sample code, I've got a WSDL...and yet I have no idea how to get this stuff into my existing .Net application. The WSDL was in a zip file, not a URL so I can't just "Add Web Reference." I've run the wsdl tool from the .Net command prompt, and it made a nice class for me...yet dropping that into my web_reference folder doesn't give me any kind of instantiatable class.
I know I'm missing something stupid. Can someone point me in the right direction please?
Actually, you can just "Add Web Reference". Give the path to the URL.
OTOH, you should be doing all new web service development (even client development) using WCF. Microsoft now considers ASMX web services to be "legacy technology".
BTW, I just tried using their address validation service, and it won't work with .NET. Both ASMX and WCF clients will attempt to use the XML serializer to consume this service, and there is a bug there that prevents that service from being used.