You can start by testing each web service using a Test Client Project (e.g. Console Project) by calling a web method and determine whether you can access your web service or not. For example:
Dim UniTest As localhost1.Service1 = New localhost1.Service1()
Console.Writeline(UniTest.HelloWorld())
The SOAP interaction happens below the scene, so in your case, it will feel as if you are just accessing another method or function.
You can also use Add Web Reference and then navigate to the web service URL in adding a reference to the WSDL if you want.