And here's yet another occasion where comcall doesn't work as it should:
With either of these progids:
; winhttp.winhttprequest
; winhttp.winhttprequest.5.1
; msxml2.serverxmlhttp
; microsoft.xmlhttp
After calling the open method, doing a $comcall(<object>,<alias>,send,1) results in the immediate calling of the <alias> instead of waiting for the send call to return.
