While it’s possible to create programs that never interact with a user at all (such as a program that controls a traffic light), it’s far more common to create programs that display a user interface of some kind. Typically, this means showing a window filled with different items such as labels to display text, text fields to allow the user to type something in, and buttons or pull-down menus to give the user control over the program.
Creating an effective user interface depends entirely on the purpose of your program. A business program typically follows standard conventions ...
