Пример #1
0
        private void lậpHóaĐơnToolStripMenuItem_Click(object sender, EventArgs e)
        {
            LapHoaDon frm = new LapHoaDon();

            frm.MdiParent = this;
            frm.Show();
        }
Пример #2
0
        private void button2_Click(object sender, EventArgs e)
        {
            LapHoaDon frm = new LapHoaDon();

            frm.ShowDialog();
        }