1. Install ViewPoint
2. Make sure the paths in \Interfaces\Windows\MATLAB\ViewPoint_EyeTracker_Toolbox\vpx_Initialize.m are correct
3. In case of fresh MATLAB installation, vpx_Initialize will give an error related to VPX_InterApp.dll and compiler. In this case, follow on-screen suggestions and run “mex -setup”. If no compiler was suggested by MATLAB, install one of freely available compilers (see e.g. http://www.mathworks.com/support/compilers/R2011b/win64.html).