>>Isn't that going to depend on the type of content (Request, Response etc) ?
>>
>>IAC it's not simple - but you can wade thru this:
>>http://tools.ietf.org/html/rfc2616#section-5
>
>In my case, it is for the incoming, such that would be Request.
>
>There is a few I can get like this:
>
>

>            cContentEncoding = oRequest.ContentEncoding.EncodingName
>            cContentType = oRequest.ContentType
>            nContentLength = oRequest.ContentLength
>
>

>
>While others like this:
>
>

>            ' For each HTTP header
>            For lnCounter = 1 To oRequest.Headers.Count
>                ReDim loObject(2)
>
>                loObject(1) = oRequest.Headers.GetKey(lnCounter - 1)
>                loObject(2) = oRequest.Headers.Get(lnCounter - 1)
>
>                oHeader.Add(loObject)
>            Next
>

>
>But, thanks for the reference

Section 5.3 in the link lists all request header content. If you look at each individually you can see if they are marked as REQUIRED or MUST (Host, for example, is required)