Visual Basic 2015 Unleashed

Executing Actions with Methods

A method is a member that performs an operation. Methods are of two kinds: Sub (which does not return values) and Function (which returns a value). The following are minimal examples of methods:

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Sub DoSomething()    If IO.File.Exists("C:\SomeFile.txt") = False Then        Throw New IO.FileNotFoundException    Else        Console.WriteLine("The file exists")    End IfEnd SubFunction DoSomethingElse() As Boolean    Dim result As Boolean = IO.File.Exists("C:\SomeFile.txt")    Return resultEnd Function

This book makes intensive use of methods, so detailed descriptions on implementations are provided across chapters.

Scope

Methods’ visibility within types can be assigned using one of the ...