CAC BAN CHIU KHO ON LAI PHAN "MANG: ARRAY LIST,..".
TAP LAM LAI CAC BAI VE FORM NHU THIET KE VA VIET CODE CHO CAC BUTTON; ON LAI BAI MAY TINH; QUAN LY HOC SINH CHO CHAC NHE.
HOC CAC CAU TRUC LENH, CAC THUOC TINH (PROPERTIES) CUA CONTROL, FORM BAI THI SE LA PHAN LY THUYET DO.
CHUC CAC BAN ON TOT VA WA MON NAY.
TECH CUBAP.