this one, hopes got it
VB Code:
  1. Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

  2.         If ListBox1.Enabled Then

  3.             TextBox1.Text = ListBox1.SelectedItem

  4.         ElseIf ListBox2.Enabled Then

  5.             TextBox1.Text = ListBox2.SelectedItem

  6.         End If

  7.         ListBox1.Enabled = True

  8.         ListBox2.Enabled = True

  9.         ListBox1.SelectedIndex = -1

  10.         ListBox2.SelectedIndex = -1

  11.     End Sub