Public Class Form1
 
    Private rnd As New Random
    Private Zahl() As Double
 
    Private Sub berechne()
        Dim i As Integer
        For i = 0 To 11
            Zahl(i) = rnd.NextDouble()
        Next
    End Sub
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
        Dim a As Integer
        For a = 0 To 11
            ListBox1.Items.Add(Zahl(a))
 
 
        Next
        berechne()
    End Sub
End Class