Interface (VB.Net and Access VBA Cross Reference Guide)

With VB.Net you define an interface with the Interface keyword and use it in a class with the Implements keyword. In the resulting class, you implement each property and method and add Implements Interface.Object to each as in:

Sub Speak(ByVal pSentence As String) Implements IHuman.Speak

  MessageBox.Show(pSentence)

End Sub

Public Interface IHuman
  'Specify interface methods and properties here.

End Interface
  

Public Class Cyborg
  Inherits System.Object

End Class
  

Public Class CyborgHuman
  Inherits Cyborg
  Implements IHuman
  'Implement interface methods and properties here.

End Class

 VB.Net Interfaces (Interface, Implements)

Same as in VB6. Access VBA has limited support for interfaces. You can create an interface of abstract methods and properties and then implement them in one or more descendant classes. It's a single level implementation though (you cannot inherit beyond that). The parent interface class is a pure abstract class (all methods and properites are abstract, you cannot implement any of them in the parent class).

In the single level descendant class, you have to implement all methods and properties and you cannot add any. Your first line of code is Implements InterfaceName.