public Main_FRM()
        {
            InitializeComponent();
            if (mfr == null)
            {
                mfr = this;
            }

            this.productsToolStripMenuItem.Enabled  = false;
            this.customersToolStripMenuItem.Enabled = false;
            this.usersToolStripMenuItem.Enabled     = false;
            this.backupToolStripMenuItem.Enabled    = false;
            this.restoreToolStripMenuItem.Enabled   = false;
            FRM_LOGIN log = new FRM_LOGIN();

            log.ShowDialog();
        }
 static void closed_static(object sender, FormClosedEventArgs e)
 {
     mfr = null;
 }