private void btn_details_Click(object sender, EventArgs e) { int index = lbx_visites.SelectedIndex; if (index >= 0) { Visite selectedVisite = CRAB.LesVisites[index]; Form_Visite Gestion_Visite = new Form_Visite(selectedVisite, CRAB); Gestion_Visite.ShowDialog(); CRAB.lierVisites(lbx_visites, CRAB.LesVisites); } }