hello @Sanjeevi, welcome to the AutoIt forum.
first - your topic title is correct. AutoIt indeed does not directly support DevExpress controls.
second - when you post code to this forum, please use the code tags (the icon looking like < > in the toolbar).
third - disregard the UAC thing. as long as you have #RequireAdmin at the top of your script, UAC prompt is triggered before the script even begins, so the entire script is already elevated.
and finally - google "autoit devexpress" yields some interesting results, especially this article from the DevExpress support forum, stating that DevExpress might support UIAutomation (which AutoIt does support, with an additional UDF pinned to the top of the "Example Scripts" forum). this article also mentions their "Coded UI Test Extension", which i know nothing about but might be useful to you.