Hi John,

A quick search of MSDN -

http://support.microsoft.com/support/kb/articles/Q195/6/50.ASP

Might this help?

>Hi, I'm hoping somebody can tell me how to use the "Proxy-Authorization" header when sending HTTP requests. Everyplace I have found documentation on this, it does not include any syntax for how to use it. I have a user id and a password that needs to be sent with it. Has somebody here used this header before?
>
>Thanks.