Hi @alexandre,
The Tobii EyeX/Interaction Engine API does not provide control over the calibration flow at all. It has a couple of functions related to calibration where you can launch a recalibration of the current user profile, or launch a four point guest calibration. These calibrations are launched as separate applications and are the same that can be launched from the Tobii EyeX task bar menu.
The basic idea for the consumer use case (where a user has her or his eye tracker attached to a desktop or laptop PC monitor) is that the user should only have to do calibration once in one place, and then be able to use the eye tracker with all the different eye tracking client applications running on the system.