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Using CommandButton controls is trivial. In most cases, you just draw the control on the form's surface, set its Caption property to a suitable string (adding an & character to associate a hot key with the control if you so choose), and you're finished, at least with user-interface issues.

Key trapping - Tell what keys your users are pressing

Polymorphism is one of the key concepts in Object Oriented Programming. Using polymorphism enables the programmer to design software that is easily extensible which, in turn, prolongs the life of that program.

In VB.NET we can receive and handle events in 2 ways. The first one is using WithEvents and Handles keywords, and the second way is to use the AddHandler method and dynamically add event handlers through our code and with RemoveHandler dynamically remove them.

How do you tell what keys your users are pressing? This tutorial teaches you a rock solid method that you can build in games and advanced applications.