If you want to get information from the EyeX Engine about the physical size and resolution of the eye tracking screen, as well as updates when they change, take a look at the updated MinimalStatusNotificationsSample in the Tobii EyeX SDK for C/C++ version 0.16.

MinimalStatusNotifications

We have also added an experimental sample to show how to use the Fixation data stream. It does not work so well in the published EyeX Engine version, but will be fixed in coming releases.

Get the new release from the downloads page.