Private Sub lv_SelectedIndexChanged(ByVal sender As System.Object, ByVal e _
     As System.EventArgs) Handles lv.SelectedIndexChanged
 
        Dim sItemText As String = CType(sender, ListView).FocusedItem.Text
        If Not bHasJustBeenEdited Then
            If sItemText.EndsWith("x") Then
                sItemText = sItemText.Substring(0, sItemText.Length - 1)
                If IsNumeric(sItemText) Then
                    lv.FocusedItem.Text = sItemText
                End If
            End If
        Else
            If IsNumeric(sItemText) Then
                lv.FocusedItem.Text = sItemText & "x"
            End If
            bHasJustBeenEdited = False
        End If
    End Sub
 
    Private Sub lv_BeforeLabelEdit(ByVal sender As Object, ByVal e As _
      System.Windows.Forms.LabelEditEventArgs) Handles lv.BeforeLabelEdit
        bHasJustBeenEdited = True
    End Sub

    Private Shared bHasJustBeenEdited As Boolean