private void Produccion_2000_Load(object sender, EventArgs e)
        {
            Tmr_tiempo.Start();
            Lbl_fecha.Text = DateTime.Now.ToLongDateString();
            Lbl_hora.Text  = DateTime.Now.ToLongTimeString();

            MdiClient ctiMDI;

            foreach (Control cti in this.Controls)
            {
                try
                {
                    ctiMDI        = (MdiClient)cti;
                    cti.BackColor = this.BackColor;
                }
                catch (InvalidCastException exc)
                {
                }
            }
        }
 private void Tmr_tiempo_Tick(object sender, EventArgs e)
 {
     Lbl_hora.Text = DateTime.Now.ToLongTimeString();
     Tmr_tiempo.Start();
 }