private void valorFacturaToolStripMenuItem_Click(object sender, EventArgs e)
{
bill_value.Close();
bill_value = new BillValue(stored_users);
bill_value.MdiParent = this;
bill_value.Show();
}
public Form1()
{
register_form = new Form2(stored_users, users_stack);
users_stack = new Users(stored_users);
bill_value = new BillValue(stored_users);
consume_average = new ConsumeAverage(users_stack);
discounts_total = new DiscountsTotal(users_stack);
save_per_stratum = new SavePerStratum(users_stack);
goal_overpast = new GoalOverpast(users_stack);
InitializeComponent();
}