private int UpdateThuoc()
        {
            int kq = 0;
            if (gridMaster.SelectedRows.Count != 0)
            {
                DataGridViewRow row = this.gridMaster.SelectedRows[0];
                string MaThuoc = row.Cells["MaThuoc"].Value.ToString();

                frmDanhMucThuocChiTiet frmChiTiet = new frmDanhMucThuocChiTiet();
                frmChiTiet.MaDM = MaThuoc;
                frmChiTiet.ShowDialog();
                LoadGridView();
            }
            return kq;
        }
 private int Insert()
 {
     int kq = 0;
     frmDanhMucThuocChiTiet frmChiTiet = new frmDanhMucThuocChiTiet();
     frmChiTiet.ShowDialog();
     LoadGridView();
     return kq;
 }