Private Sub GRID_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles TabAssegna.EditingControlShowing

   If Me.GRID.CurrentCell.ColumnIndex = 0 Then
      RemoveHandler e.Control.KeyDown, AddressOf cell_KeyDown
      AddHandler e.Control.KeyDown, AddressOf cell_KeyDown
   End If

End Sub