eye and gaze tracking in opencvsharp

Hi, I want to understand that part of the screen, for example, the computer that the user's eye is looking at. I mean, I want the eye to act like a mouse. Wherever the eye moves, the mouse pointer moves as well. How to write this program in C # language and image processing and webcam and opencvsharp library. Does Libray openvsharp . have an example for eye tracking?