qualcosa del genere

Set objXML = Server.CreateObject("MSXML2.ServerXMLHTTP")
objXML.open "POST", "mysite.com blah blah", False
objXML.SetRequestHeader "Content-Type", "application/x-www-form-urlencoded"
objXML.send(Request.Form)
myResponse = objXML.responsetext
Set objXML = Nothing