call a apache soap service from vb

[[EMAIL PROTECTED]]

i have un apache-soap service that i call from a java client:
:
     URL url = new URL( "http://localhost:8080/soap/servlet/rpcrouter"; );
     String urn = "urn:demo1:exchange";
:
     params.addElement( new Parameter( "country1", String.class, "USA", null ) );
     params.addElement( new Parameter( "country2", String.class, "japan", null ) );
     call.setParams( params );
:
       Response response = call.invoke( url, "" ); // invoke the service
:
       Parameter result = response.getReturnValue(); // response was OK
:
how can i call the same service from a vb client?
:
    Set sc = New SoapClient
    sc.mssoapinit  "????????"
:
    sRes = sc.getRate("USA", "japan")
:

federico