private void nav_retour_clt_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
        {
            timer2.Start();
            if (SplashScreenManager.Default != null && SplashScreenManager.Default.IsSplashFormVisible)
            {
                SplashScreenManager.CloseForm();
            }
            SplashScreenManager.ShowForm(typeof(WaitForm1));
            if (rttt == null)
            {
                rttt = new retour_client();
            }
            else
            {
                wait = 1;
            }


            rttt.MdiParent = Form1.ActiveForm;
            rttt.Show();
            rttt.BringToFront();
        }
        private void simpleButton2_Click(object sender, EventArgs e)
        {
            retour_client rr = new retour_client();

            rr.ShowDialog();
        }