Calling WCF Service from a VS.NET 2010 Custom Start Page

I'm making a custom VS.NET 2010 Start Page, which uses a WPF control if you've never seen the template, and am wondering how I'd go about calling a WCF开发者_Go百科 service. I know how to add the Web Service reference, of course, but I'm curious what I need to do about the config changes. How do I need to configure things to call a WCF Service from a plugin like this?

Thanks in advance!