[2/6] winhttp: Allow winhttp to use wininet.h with winhttp.h

[Zac Brown]

James Hawkins wrote:
> On Fri, Jul 18, 2008 at 9:11 AM, Dan Kegel <dank at kegel.com> wrote:
>> James wrote:
>>> I thought the idea was to implement winhttp and then
>>> implement wininet on top of winhttp.  Why are you importing wininet?
>> As of January, Hans was still talking about implementing
>> winhttp on top of wininet
>> ( http://www.winehq.org/pipermail/wine-devel/2008-January/062172.html
>> http://www.winehq.org/pipermail/wine-devel/2007-August/058420.html )
>>
>> It's not clear one can fully implement either wininet on top
>> of winhttp or vice versa.  We will probably need some code
>> duplication or private interfaces eventually.
>>
>> Building winhttp on top of wininet lets us develop on trunk and
>> is probably the fastest path to making a bunch of applications
>> happy, isn't it?   That's the way I'm leaning, anyway.
>>
> 
> Sure, I was just going by the words of those I considered more
> experienced than me in this area, and my impression was that wininet
> was a subset of the functionality found in winhttp, but it seems
> that's not the case.  It would not surprise me at all if the Windows
> implementations of these two modules are separate.
> 

They are in fact separate. At least by Dan H.'s looking at it. He mentioned that 
winhttp never actually imports wininet and as far as he can tell, they're 
separate albeit sharing many similar data structures.