DataGridView 1列を非選択にする

 Private Sub DataGridView1_SelectionChanged(sender As Object, e As EventArgs)

_Handles DataGridView1.SelectionChanged
        If DataGridView1.CurrentCell.ColumnIndex = 0 Then 'フォーカスが1列目か？
            DataGridView1.CurrentCell = Nothing                 'フォーカスを消す
        End If
End Sub