private void navBarItem4_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
        {
            Chagepassword cp = new Chagepassword(s);

            cp.Show();
        }
 private void đổiMậtKhẩuToolStripMenuItem_Click(object sender, EventArgs e)
 {
     ttt = new Chagepassword(s);
     ttt.Show();
 }