VB.Net Tutorial/Class Module/Varied length method parameter

ParamArray Parameter (Variable Args)

Module Module1
    Sub Main()
        ShowMessage("Hello there!")
        ShowMessage("Hello", " there!")
    End Sub
    Sub ShowMessage(ByVal ParamArray Text() As String)
        Dim i As Integer
        For i = 0 To UBound(Text)
            System.Console.Write(Text(i))
        Next i
    End Sub
End Module

Hello there!Hello there!"

Using ParamArray to create variable-length parameter lists.

Module Tester
   Sub Main()
      AnyNumberArguments()
      AnyNumberArguments(2, 3)
      AnyNumberArguments(7, 8, 9, 10)
   End Sub " Main
   Sub AnyNumberArguments(ByVal ParamArray array1 _
      As Integer())
      Dim i, total As Integer
      total = 0
      If array1.Length = 0 Then
         Console.WriteLine(" received 0 arguments.")
      Else
         Console.Write("The total of ")
         For i = 0 To array1.GetUpperBound(0)
            Console.Write(array1(i) & " ")
            total += array1(i)
         Next
         Console.WriteLine("is {0}.", total)
      End If
   End Sub
End Module

received 0 arguments.
The total of 2 3 is 5.
The total of 7 8 9 10 is 34.

Varied length Method parameter

Option Strict On
 Imports System
 Class Tester
     Public Shared Sub DisplayVals(ByVal ParamArray intVals( ) As Integer)
         Dim i As Integer
         For Each i In intVals
             Console.WriteLine("DisplayVals {0}", i)
         Next i
     End Sub
     Shared Sub Main( )
         Dim a As Integer = 5
         Dim b As Integer = 6
         Dim c As Integer = 7
         Console.WriteLine("Calling with three Integers")
         DisplayVals(a, b, c)
         Console.WriteLine("Calling with four Integers")
         DisplayVals(5, 6, 7, 8)
         Console.WriteLine("calling with an array of four Integers")
         Dim explicitArray( ) As Integer = {5, 6, 7, 8}
         DisplayVals(explicitArray)
     End Sub
 End Class

Calling with three Integers
DisplayVals 5
DisplayVals 6
DisplayVals 7
Calling with four Integers
DisplayVals 5
DisplayVals 6
DisplayVals 7
DisplayVals 8
calling with an array of four Integers
DisplayVals 5
DisplayVals 6
DisplayVals 7
DisplayVals 8