private void mainForm_Load(object sender, EventArgs e)
        {
            accuielForm ac = new accuielForm();

            ac.MdiParent = this;
            ac.Show();
        }
        private void barButtonItem1_ItemClick(object sender, ItemClickEventArgs e)
        {
            accuielForm ac = new accuielForm();

            ac.MdiParent = this;
            ac.Show();
        }