. know when a user has clicked something, we use variables to hold the data. Each variable has what we call a type, which determines exactly what the variable can hold. For example, a variable of. the case of a CardboardBox, we can say it has a Thickness, Height, Width, and Length. The has a relationship can give us a lot of information about an object or allow us to perform an action. Developer for .NET, and a Microsoft Certified Professional.Fabio is a prolific author and technical reviewer. Over the past ten years, he has written articles for Italian and international magazines...