I wrote a simple web service function using ASMX:

Code:
	Public Function processMessage(ByVal Messages as XMLElement) As String	 	
        Dim strS as string
        strS = Messages.outerXML
        Return strS
    End Function
This should is used to handle SOAP request like the following:
Code:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
...