I was reading [link|http://www.c-sharpcorner.com/UploadFile/boscowilfred/SOAPClientinWindowsXP11162005010927AM/SOAPClientinWindowsXP.aspx?ArticleID=23f9e26b-6dbe-4eca-8cb4-df86fa05ef36"|this article] yesterday.
This article covers the basics of using the SOAP Client software included with Microsoft Windows XP Professional to access Web Services using SOAP.
I also saw [link|http://www.stylusstudio.com/java_web_services.html?refsrc=gaw&reftype=webservice|this thing], which is supposed to help you test SOAP calls.