Sonic, this is the problem I posted in the earlier day of iGnative. If you can read RR's label with your app, you can use IGHWND label. It is a window handler for IG when iG is running regardless native or not. IGHWND is set to 0 when not running.
I am not use how you use it with autoIt. Normally, that is the long value return back when you use any of windows api to look for an app.