【VB.NET】DataGridViewで今の選択セルと一つ前の選択セルを取得する

 Private Sub DataGridView1_CellStateChanged(sender As Object, e As DataGridViewCellStateChangedEventArgs) Handles DataGridView1.CellStateChanged

     If e.Cell.Selected Then
         Debug.WriteLine("フォーカスを取得したセル：" & e.Cell.Value)
     Else
         Debug.WriteLine("フォーカスを失ったセル：" & e.Cell.Value)
     End If

 End Sub

  Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

      Dim dt As New DataTable
      With dt
          .Columns.Add("ProductCode", GetType(String))
          .Columns.Add("Date", GetType(String))
          .Rows.Add("A001", "2023/03/12")
          .Rows.Add("A002", "2000/02/04")
          .Rows.Add("A003", "2020/12/10")
          .Rows.Add("A004", "2026/09/01")
      End With

      With DataGridView1
          .DataSource = dt
      End With

  End Sub