Hi @supriya, I am afraid that for the time being, within the Tobii XR SDK calibration is only currently possible via the Tobii Core Software System Tray Icon.
As a possible workaround, you can launch a quick calibration via an internal windows command:
c:\Program Files (x86)\Tobii\Tobii EyeX Config\Tobii.EyeX.Configuration.exe –quick-calibration
But this may not necessarily provide sufficient accuracy for new users. Our Apologies for any inconvenience caused, hopefully, this does not hinder your project development. Best Wishes.