VISUAL BASIC (2 Edition), For Beginners, Learn Coding Fast (With 100 Tests & Answers) Crash Course, Quick Start Guide, Tutorial Book with Hands-On Projects in Easy Steps! An Ultimate Beginners Guide! by Ray Yao

Author:Ray Yao
Language: eng
Format: azw3
Publisher: Rails Excel Sharepoint Angularjs Access Lamp Actionscript VBA Photoshop Illustrator ColdFusion Teach Yourself
Published: 2017-07-28T07:00:00+00:00

Example 6.8

Module Module1

Public Class Computer 'declare a base class

Public Function display()

Console.WriteLine("Computer OK")

Console.ReadLine()

End Function

End Class

Public Class Laptop

Inherits Computer ‘declare a derived class

'drived class’s members in here

End Class

Sub Main()

Dim Lt As Laptop

Lt = New Laptop() 'derived class creates an object Lt

Lt.display() 'Lt calls base class's method

End Sub

End Module

Output:

Computer OK!

Explanation:

“Inherits” is a keyword of inheritance.

“Inherits” should appear in new line.

“Lt. display( )” means a derived class object “Lt” calls base class’s method display( ), because an object of derived class can access the public member of base class.

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