Issue automating Google Calendar file export

[computergroove]

I need to make a script that exports the google calendar to the local disk once a day and will have 10 backups before the oldest backup is overwritten. I will schedule this to run at 3am in the windows scheduler so it will only run once a day. I want to use IE because it's native to Windows. This is what I have:

#include <IE.au3>
#include <Date.au3>
#include <MsgBoxConstants.au3>

$password = "your password"

If FileExists("c:\Users\user\Documents\Google Calendar Backups") Then
    ExitLoop
Else 
    DirCreate("c:\Users\user\Documents\Google Calendar Backups")
EndIf
If @error Then
    MsgBox(0,"Google Calendar Backup Problem Encountered","Error 1")
EndIf
_IENavigate($oIE,"https://accounts.google.com/Logout?service=cl&continue=https://calendar.google.com/calendar/render");logout link for google calendar
Sleep(10000)
Send($password & "{ENTER}")
Sleep(10000)
_IENavigate($oIE,"Redacted");Link to the calendar settings I want to backup
Sleep(10000)
InetGet("Redacted","c:\Users\user\Documents\Google Calendar Backups\file.ical.zip");direct link to the export link for the file Im trying to save.

The directory gets created but the file never shows up in the directory. I have also tried to just save it to the root of c:\ with no luck. The link is an encrypted link like "https://calendar.google.com/calendar/exporticalzip?cexp=b2NqdTkxaWlyODQ2ZzhibGJlZm5vbzBkaGdAZ3JvdXAuY2FsZW5kYXIuZ29vZQ" (not the real link). Will this likely change over time? If so then is there a better way to automate this? I'm trying not to use mouseclick for this.

Edited February 24, 2016 by computergroove

[junkew]

Why avoiding mouseclick? If it gets the job done you should use that. Iuiautomation thread in examples is also native windows but its all about gui moving mouse and simulating keyboard.