// Click
        private void BTN_Urgence_Click(object sender, EventArgs e)
        {
            Agendas      monAgenda = new Agendas();
            Clients      monClient = (Clients)COMBO_Client.SelectedItem;
            Animaux      monAnimal = (Animaux)COMBO_Animal.SelectedItem;
            Veterinaires monVeto   = (Veterinaires)COMBO_Veto.SelectedItem;

            monAgenda.CodeAnimal = monAnimal.CodeAnimal;
            monAgenda.CodeVeto   = monVeto.CodeVeto;
            monAgenda.DateRDV    = DateTime.Now;

            MgtAgenda.Ajouter(monAgenda);

            ChargementDataGrid();
        }
        private void BTN_Valider_Click(object sender, EventArgs e)
        {
            Clients      monClient = (Clients)COMBO_Client.SelectedItem;
            Animaux      monAnimal = (Animaux)COMBO_Animal.SelectedItem;
            Veterinaires monVeto   = (Veterinaires)COMBO_Veto.SelectedItem;
            Agendas      monAgenda = new Agendas();

            monAgenda.CodeAnimal = monAnimal.CodeAnimal;
            monAgenda.CodeVeto   = monVeto.CodeVeto;
            try
            {
                monAgenda.DateRDV = new DateTime(DATE_RendezVous.Value.Year, DATE_RendezVous.Value.Month, DATE_RendezVous.Value.Day, (int)COMBO_Heure.SelectedValue, (int)COMBO_Minutes.SelectedValue, 0);
            }
            catch (Exception ex)
            {
                throw new Exception("Problème lors du passage de la date concernant l'ajout d'un RDV en urgence :\n" + ex.Message);
            }

            MgtAgenda.Ajouter(monAgenda);

            ChargementDataGrid();
        }