Hi,

While implementing the soapheaders on the client is complicated, using the soap toolkit, in .NET everything works very simply like this:

Define your soapheader class

Imports System
Imports System.Web.Services.Protocols

Public Class MySoapHeader
    Inherits SoapHeader

    Public User As String
    Public Password As String

End Class

Define your webservice like this:

Public Class WebServiceName
    Inherits System.Web.Services.WebService

    Public credentials As MySoapHeader

     Public Function _
    ValidUser() As String

        if credentials.user="X" and credentials.password="Y" then
          Return "valid user"
        Else
            Return "not a valid user"
        End If

    End Function

End Class

Now all the web service client has to do is this:

        Dim header As New localhost.MySoapHeader()
            header.User = "x"
            header.Password = "y"

            Dim Valid As New localhost.WebServiceName()
            Valid.MySoapHeaderValue = header


        Try
            TextBox1.Text = Valid.ValidUser()
        Catch soapErr As SoapException
            TextBox1.Text = soapErr.Message
        End Try

Hope this helps