Use listbox not textfile

[ycpc55]

hi
how would i go about changing this code to use a listbox and not this path to file thanks.("C:\TestText.txt")

Public Class Form1
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim s() As String = System.IO.File.ReadAllLines("C:\TestText.txt")
    MessageBox.Show(s(0)) 'First Line
    MessageBox.Show(s(1)) 'Second Line
  End Sub
End Class

[Phil Weber]

Dim FileName As String = lstBox.SelectedItem.ToString()
Dim s() As String = System.IO.File.ReadAllLines(FileName)