private void toolStripButton7_Click(object sender, EventArgs e)
        {
            frm_show_all myform = new frm_show_all();

            myform.MdiParent = this;
            myform.Show();
        }
        private void frm_main_Shown(object sender, EventArgs e)
        {
            frm_show_all myform = new frm_show_all();

            myform.MdiParent = this;
            myform.Show();
        }
        private void toolStripButton4_Click(object sender, EventArgs e)
        {
            frm_show_all myform = new frm_show_all();

            //myform.Load(sender, e);
            // myform.Load += new EventHandler(frm_show_all);
            myform.dataGridView1.DataSource            = DB.Show("GetAllBooks");
            myform.dataGridView1.Columns[0].HeaderText = "رقم الأطروحة";
            myform.dataGridView1.Columns[1].HeaderText = "عنوان الأطروحة";
            myform.dataGridView1.Columns[2].HeaderText = "ملاحظـــــــــات";
            myform.dataGridView1.DataSource            = DB.Show("GetAllBooks");
            myform.MdiParent = this;
            myform.Show();
        }