WCF Client Credentials

[=?Utf-8?B?U3RyZWFr?=]

Hi!
The application I am using has to add some custom client credentials on the
web layer(proxy) and has to verify them on the app layer(wcf).

I tried to create a custom header as follows

--------------
Public Class CustomSoapHeader
Inherits System.ServiceModel.WSHttpBinding
-- added some public properties
end class
--------------------
created a proxy using
----------------
Private _ws As Service1.Service1Client
_ws = New Service1.Service1Client(SetCustomSoapHeader(),
GetServiceEndPointAddress())
Protected Function SetCustomSoapHeader() As CustomSoapHeader
Dim Header As New CustomSoapHeader
' Set header properties
Return Header
End Function
------------------

How do I access the header properties on the app side?
any idea?

[=?Utf-8?B?U3RyZWFr?=]

Hello!
Can I expect an answer from anyone!!!?