private void reportesToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form frmReportes = new frmReportes();

            frmReportes.MdiParent   = this;
            frmReportes.WindowState = System.Windows.Forms.FormWindowState.Maximized;
            frmReportes.Show();
        }
 public frmReportes()
 {
     frmReportes.f1 = this;
     InitializeComponent();
 }