Deconstructors are generally used to clean up memory - like releasing a variable from memory - or closing a database connection. In some langauges like objc on the iPhone the deconstructor is used a lot since you have to do your own memory management.

A common way of using constructors is to have them nested providing default values for for other constructors. However, for most people in VB you will use optional parameters instead of the following example. Optional parameters aren’t usually available in other languages so this is how it is handled.

Public Sub New()
Me.New(”Category 1″)
End Sub

Public Sub New(category as String)
Me.New(category, 1))
End Sub

Public Sub New(category as String, level as Integer)
m_Category = strCat
m_Level = level
End Sub

There might be certain cases with VB to do the above. But most likely you will do a Public Sub New(Optional category as String = “Category 1″, Optional level as Integer = 1)

Note: The author mentioned this but I will explain it in a little more detail. You cannot have the following two constructors
Public Sub New(category as String, level as Integer)
Public Sub New(name as String, ID as Integer)

You cannot have constructors with the same signature, in this case two parameters where the first is a string and the second is an integer. The compiler won’t know which one to use if you do a Dim myVar as New MyClass(”Me”, 1).