qt 3 only for rotorprogrammer

I am new in qt, so many things I am not able to do. The aim of this project is to teach me how organize a main project with other projects library. 1. You have a main project called Master that has menus and toolbars. 2. A menu called "Operations" that has "addition","subtraction","multiplication" and "division" subitem. Then clicking on a subitem menu a dialog is displayed that accept two numbers and calculate addition or division and so on 3. But the "core" of operations is in lib called MyLib that stay in project a part 4. I want have in the same project the full control of Master Project and Mylib project. I hope I have been clear.I know to do this with VisualSTudio but not in QT.