private void quảnLýThuốcToolStripMenuItem_Click(object sender, EventArgs e)
        {
            QuanLyThuoc Thuoc = new QuanLyThuoc();

            this.Hide();
            Thuoc.ShowDialog();
        }
        private void chỉnhSửaThôngTinThuốcToolStripMenuItem_Click(object sender, EventArgs e)
        {
            QuanLyThuoc thuoc = new QuanLyThuoc();

            thuoc.ShowDialog();
            this.Hide();
        }
        private void xóaThuốcKhỏiDanhMụcToolStripMenuItem_Click(object sender, EventArgs e)
        {
            QuanLyThuoc thuoc = new QuanLyThuoc();

            thuoc.ShowDialog();
            this.Hide();
        }
        private void button2_Click_1(object sender, EventArgs e)
        {
            QuanLyThuoc thuoc = new QuanLyThuoc();

            this.Hide();
            thuoc.ShowDialog();
        }