' Visual Basic 2008 9.0 .NET Examples - Introduction to Functions - Procedures and Functions : 
Module Example1
    Sub Main()
        Dim value1 As Integer = 5
        Dim value2 As Integer = 10
        Dim sum As Integer
        '
        MakeSum(value1, value2, sum)
        Console.WriteLine(sum)
        '
        Console.ReadLine()
    End Sub
    Sub MakeSum(ByVal value1 As Integer, ByVal value2 As Integer, _
                ByRef sum As Integer)
        sum = value1 + value2
    End Sub
End Module
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