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Visual Basic 2015 Unleashed
book

Visual Basic 2015 Unleashed

by Alessandro Del Sole
July 2015
Intermediate to advanced content levelIntermediate to advanced
1300 pages
87h 27m
English
Sams
Content preview from Visual Basic 2015 Unleashed

Declaring Delegates

A delegate is defined via the Delegate keyword followed by the method signature it needs to implement. Such a signature can be referred to as a Sub or as a Function and might or might not receive arguments. The following code defines a delegate that can handle a reference to methods able to check an email address, providing the same signature of the delegate:

Public Delegate Function IsValidMailAddress(ByVal emailAddress _                                            As String) As Boolean

Delegates Support Generics

Delegates support generics, meaning that you can define a Delegate Function DelegateName(Of T) or Delegate Sub DelegateName(Of T).

Notice that IsValidMailAddress is a type and not ...

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Publisher Resources

ISBN: 9780134196664Purchase book