Many statisticians have been using object-oriented languages such as S-PLUS, R, and MATLAB to make programs for new data analysis methods. S-PLUS and R are slower in computation as well as in processing large data sets than MATLAB. Recently MATLAB is often used for developing statistical analysis programs owing to its fast computing ability and abundant mathematical algorithm modules. Sometimes it is hard for non-statistician to understand MATLAB programs which are developed by statisticians. Therefore Graphical User Interface(GUI) is needed to facilitate the usage of MATLAB codes. In this paper, we introduce how to develop a GUI for MATLAB codes which is executable on Windows with examples.