Anyone can tell me I should do to compile the source code of this application I already install the ant and copy the jar from the lib folder to the lib folder of java run the ant and send me 23 errors I do not know what is wrong .

This question is for its creator UJS first of all congratulate you on your excellent work

, I my question is:
I can add a few improvements to your program? and also what happens if I sell an interactive whiteboard with part of your program and mine to a company there is a problem with that?
and another question is there any problem if I'm selling the product that is creating Jhony Lee is copyright or legal stuff
sorry for the English and thank you for your answers
