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   ► KBProgrammingVB.NetLanguage Basics   Print This     
  From the May 2015 Issue of Prestwood eMag
 
VB.Net Language Basics:
VB.Net Overloading (Overloads, or implicit)
 
Posted 11 years ago on 10/27/2008 and updated 10/24/2009
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 Tags: VB.Net , Overloading

KB101468

General Info: Overloading

Types of overloading include method overloading and operator overloading.

Method Overloading is where different functions with the same name are invoked based on the data types of the parameters passed or the number of parameters. Method overloading is a type of polymorphism and is also known as Parametric Polymorphism.

Operater Overloading allows an operator to behave differently based on the types of values used. For example, in some languages the + operator is used both to add numbers and to concatenate strings. Custom operator overloading is sometimes referred to as ad-hoc polymorphism.

VB.Net Overloading

VB.Net supports both method and operator overloading.

For method overloading, you either use implicit overloading (no special syntax like C#) or use the Overloads keyword. If you use the Overloads keyword, all overloaded methods with the same name in the same class must include the Overloads keyword.

More Info

Definition:  Overloading

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Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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Linked Certification Question(s)

The following are practice certification questions with answers highlighted. These questions were prepared by Mike Prestwood and are intended to stress an important aspect of this KB post. All our practice questions are intended to prepare you generally for passing any certification test as well as prepare you for professional work.

Advanced

1 Advanced Level Question

Question #1: Multiple Choice

Which of the following statements best describes method overloading?

Answer:
1. 

For method overloading, you use implicit overloading (no special syntax) .

2. 

For method overloading, you use the Overloads keyword. If you use the Overloads keyword, all overloaded methods with the same name in the same class must include the Overloads keyword.

3. 

For method overloading, you either use implicit overloading (no special syntax) or use the Override keyword. If you use the Override keyword, all overloaded methods with the same name in the same class must include the Override keyword.

4. 

For method overloading, you either use implicit overloading (no special syntax) or use the Overloads keyword. If you use the Overloads keyword, all overloaded methods with the same name in the same class must include the Overloads keyword.

5. 

For method overloading, you use the Implicit keyword. If you use the Implicit keyword, all overloaded methods with the same name in the same class must include the Implicit keyword.


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