public int cthd_update(string MaHD, string MaHang, int SL) { return(cthddal.CTHD_update(MaHD, MaHang, SL)); }
public int CTHD_update(string MaHD, string MaLoaiHang, int SL) { return(cthddav.CTHD_update(MaHD, MaLoaiHang, SL)); }