With the help of Mr Marco Cioffi, I finally added a Google Calendar event with VBScript.  He posted a great example script (one that I’ve been searching for over the last several days), but his site is in “Maintenance Mode” so I had to access the cached version.

This example uses the “MSXML2.ServerXMLHTTP” object, which can retrieve data from remote servers as well as perform GET and POST methods.  This transaction is done on the server, and is therefore invisible to the user (though it may be vulnerable to sniffing, I think)

Replace “me@gmail.com” with your email/calendar name, and “secret” with your password.

NOTE: Google strongly recommends NOT using the username/password login authentication in web apps.  Use AuthSub instead.

Here’s my implementation:

<% 

      set xmlhttp = CreateObject("MSXML2.ServerXMLHTTP")
      xmlhttp.open "POST", "https://www.google.com/accounts/ClientLogin", false
      xmlhttp.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
      xmlhttp.send "accountType=HOSTED_OR_GOOGLE&Email=me@gmail.com&Passwd=secret" _
      & "&source=Gulp-CalGulp-1.05&service=cl"

      lines = Split(xmlhttp.responseText, vbLf)
      nvp = Split(lines(2), "=")

      set xmlhttp = nothing

      calentry = "<?xml version='1.0' ?><entry xmlns='http://www.w3.org/2005/Atom' " _
      & "xmlns:gd='http://schemas.google.com/g/2005'>" _
      & "<category scheme='http://schemas.google.com/g/2005#kind' " _
      & "term='http://schemas.google.com/g/2005#event'></category>" _
      & "<title type='text'>Tennis with Beth</title>" _
      & "<content type='text'>Meet for a quick lesson.</content>" _
      & "<gd:transparency " _
      & "value='http://schemas.google.com/g/2005#event.opaque'>" _
      & "</gd:transparency>" _
      & "<gd:eventStatus " _
      & "value='http://schemas.google.com/g/2005#event.confirmed'>" _
      & "</gd:eventStatus>" _
      & "<gd:where valueString='Rolling Lawn Courts'></gd:where>" _
      & "<gd:when startTime='2010-01-22T15:00:00.000Z' " _
      & "endTime='2010-01-22T17:00:00.000Z'></gd:when>" _
      & "</entry>"      

      url = "http://www.google.com/calendar/feeds/default/private/full"

      postEntry(url)

      function postEntry(url)

        set xmlhttp = CreateObject("MSXML2.ServerXMLHTTP")
        xmlhttp.open "POST", url, FALSE
        xmlhttp.setRequestHeader "Content-type", "application/atom+xml"
        xmlhttp.setRequestHeader "X-If-No-Redirect", "True"
        xmlhttp.setRequestHeader "Authorization", "GoogleLogin auth=" & nvp(1)
        xmlhttp.send calentry

        testUrl = InStr(url,"?gsessionid")

        if testUrl=0 then
          redirect = xmlhttp.getResponseHeader("X-Redirect-Location")
          postEntry(redirect)
        end if

        set xmlhttp = nothing

      end function

%>

This will definitely come in handy later.