This should get you started:
AutoItSetOption("WinTitleMatchMode",2)
$IEPATH= "c:\program files\internet explorer\iexplore.exe" & " www.google.com"
Run($IEPATH,"",@SW_MINIMIZE)
Sleep(3000)
;ControlSend("Microsoft Internet Explorer","","Edit1","www.google.com" & "{ENTER}")
ControlSend("Google - Microsoft Internet Explorer","","Internet Explorer_Server1","AutoIt3" & "{ENTER}")
Sleep(2000)
WinSetState("Google", "",@SW_MAXIMIZE)