>I found this: http://watirmelon.com/2010/11/24/elegantly-handling-basic-browser-authentication-with-watir/
>
>It basically says you can do this using a URL like this:
>
>http//username:password@yourwebsite.com
>
>However, it is disabled by default so you'd need to edit the registry to re-enable it:
>
>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_HTTP_USERNAME_PASSWORD_DISABLE
>
>by adding iexplore.exe and setting a DWORD value of 0 and adding explorer.exe and doing the same.

Yes, that support is not there by default.

I was more looking into something like this:

        Dim lcHeader As String = ""
        Dim loInternetExplorer As Object = Nothing
        Dim loString As Framework.StringFunction = New Framework.StringFunction(oApp)

        ' Convert to Base64
        loString.cText = "username:password"
        If Not loString.ConvertToBase64FromText() Then
            MessageBox.Show(loString.cMessage)
        End If

        lcHeader = "Authorization: Basic " + loString.cEncoded + oApp.cCR

        ' Sharepoint
        loInternetExplorer = CreateObject("InternetExplorer.Application")
        loInternetExplorer.Visible = True
        loInternetExplorer.Navigate2("https://something.domain.com/SitePages/Home.aspx", Nothing, Nothing, lcHeader)

The problem here is that https://something.domain.com/SitePages/Home.aspx is the main entry point. But, when the basic authentication appears, it indicates somethingelse.domain.com. This is like that because the company where this resides only has one IP public. So, they have some kind of alias inside. I think this is why the basic authentication would not work with this code. I will have to try this against another test site which is working with the same domain throughout the entire authentication.