private void toolStripButton7_Click(object sender, EventArgs e)
        {
            regester regest = new regester();

            // regest.MdiParent = this;
            // regest.WindowState = FormWindowState.Maximized;
            regest.Show();
        }
        private void 增添个人信息ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            regester regest = new regester();

            // regest.MdiParent = this;
            // regest.WindowState = FormWindowState.Maximized;
            regest.Show();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            regester regester1 = new regester();

            regester1.Show();
        }