Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
  System.EventArgs) Handles Button1.Click
        Dim test() As String
 
        test(0) = "hallllllo"
end sub

http://www.galileocomputing.de/openbook/asp/asp030008.htm#Rxxasp03551Arbeitenmi_
  tArrays