differences between Msxml2.ServerXMLHTTP and WinHttp.WinHttpRequest?

Question

just when I finally understood the difference between Msxml2.XMLHTTP and Msxml2.ServerXMLHTTP

http://support.microsoft.com/kb/290761

XMLHTTP i

Answer 1

Msxml2.XMLHTTP and Msxml2.ServerXMLHTTP are two components share the similar interface for fetching XML files over HTTP protocal. The former is built upon URLMon, which relies on WinINet. The later is built upon WinHTTP, which is a server friendly replacement for WinINet. To put it simple - ServerXMLHTTP = XML + WinHTTP.