private void btnVolver_Click(object sender, EventArgs e)
        {
            fMenu m = new fMenu();

            m.Show();
            Hide();
        }
        private void volverToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fMenu m = new fMenu();

            m.Show();
            Hide();
        }
 private void button1_Click(object sender, EventArgs e)
 {
     menuE.Show();
     Hide();
 }