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Hi @drmonalisa, could you kindly clarify what you are trying to achieve?
If you are trying to find out if the Tobii software stack is installed on the system?
The best approach therefore would be to load the DLL’s and try to enumerate all connected eye trackers. If none are found, then either the software stack is not installed or the tracker is not connected to the PC.
Thank you for further details on your project. Best Wishes.