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   ► KBProgrammingVB.Net   Print This     
  From the September 2009 Issue of Prestwood eMag
 
VB.Net Parameters (ByVal, ByRef)
 
Posted 12 years ago on 11/15/2008 and updated 1/21/2009
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 Tags: VB.Net , Parameters

KB101629

VB.Net Parameters

By Reference or Value
For parameters, you can optionally specify ByVal or ByRef. ByVal is the default if you don't specify which is changed from VB Classic (in VB Classic, ByRef was the default).

Syntax Example:
Private Function Add(ByRef a As Integer, _
ByRef b As Integer) As Integer
  Add = a + b
End Function

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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.

Intermediate

1 Intermediate Level Question

Question #1: Multiple Choice

Which of the following statements best describes by value and by reference parameters?

Answer:
1. 

For parameters, you can optionally specify ByVal or ByRef. ByRef is the default if you don't specify.

2. 

For parameters, you can optionally specify ByVal or ByRef. ByVal is the default if you don't specify.

3. 

For parameters, you must specify either Val or Ref. There is no default.

4. 

For parameters, you can optionally specify Val or RefRef is the default if you don't specify.

5. 

For parameters, you can optionally specify Val or Ref. Val is the default if you don't specify.


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