private void EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if ((sender as DataGridView).CurrentCell.OwningColumn.Name == "MyNumericColumn")
e.Control.RightToLeft = System.Windows.Forms.RightToLeft.No;
else
e.Control.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
}