private void gestionDepartamentoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (formDepto == null)
            {
                formDepto             = new FormGestionDepartamento();
                formDepto.MdiParent   = this;
                formDepto.FormClosed += new FormClosedEventHandler(formDepto_FormClosed);

                formDepto.Show();
            }
            else
            {
                formDepto.Activate();
            }
        }
 private void formDepto_FormClosed(object sender, FormClosedEventArgs e)
 {
     formDepto = null;
 }