Constructs: Is a method that runs when a new instance at class is created. It is called Sub New. Sub New may have arguments. Constructs may be overloaded.

Events: Different from VB6.
Class ClassName
Event EventName ( .. )

RaiseEvent EventName ( .. )
End Class


Trapping Events with WithEvents:
Module MainMode
Dim WithEvents EventName As New EventType
:
Sub SubName
EventName ( .. )
End Sub
End Module.


Constructors and Destructors

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
System.EventArgs) Handles Button1.Click
Dim oClass As ThisClass = New ThisClass()
oClass.Dispose()
oClass = Nothing
End Sub
End Class

Public Class ThisClass

Public Sub New()
MessageBox.Show("NEW")
End Sub


Protected Overrides Sub Finalize()
MyBase.Finalize()
MessageBox.Show("Finalize")
End Sub

Protected Sub Dispose()
MessageBox.Show("Dispose")
End Sub
End Class




The Finalize is not called right away, it is called when ever the garbage collector needs to clean up the memory (or when the app is closed). So to get around the problem programmers create a function called dispose and call it explicitly.

System.GC: Lets you access the garbage collection programmatically. However, this may slow down the application.