Namespace localhost
    ・・・
    Public Class MyWebService
        Inherits System.Web.Services.Protocols.SoapHttpClientProtocol
        ・・・
        Public Function GetTextFile(ByVal FileName As String) As String
            Dim results() As Object = Me.Invoke("GetTextFile", New Object() {FileName})
            Return CType(results(0),String)
        End Function
        ・・・
    End Class
End Namespace