just when I finally understood the difference between Msxml2.XMLHTTP and Msxml2.ServerXMLHTTP
http://support.microsoft.com/kb/290761
XMLHTTP is designed for client applications and relies on URLMon, which is built upon Microsoft Win32 Internet (WinInet). ServerXMLHTTP is designed for server applications and relies on a new HTTP client stack, WinHTTP. ServerXMLHTTP offers reliability and security and is server-safe. For more information, see the MSXML Software Development Kit (SDK) documentation.
suddenly I find WinHttp.WinHttpRequest...
http://msdn.microsoft.com/en-us/library/aa382925(VS.85).aspx
Microsoft Windows HTTP Services (WinHTTP) provides developers with a server-supported, high-level interface to the HTTP/1.1 Internet protocol. WinHTTP is designed to be used primarily in server-based scenarios by server applications that communicate with HTTP servers.
so, how is this different from Msxml2.ServerXMLHTTP
(well, the implicit question is which one should I use...)