Agak ribet emang di access utk antisipasi ini, kalo ga mau pake func
isempty( ) agak riskan.
1. buat flag textbox, kalo form terupdate/ada penginputan flag = 1, set
di form afterupdate properties
2. waktu user mau keluar dengan tekan tombol cmd close, kasih kondisi
if flag = 1 then msgbox sudah ada isi mau di save ? if yes move focus to
save cmd, if no delete current record
3. jangan lupa set control box = no, soalnya user juga sering klik tanda
X di kanan form
mungkin ada yg mau nambahin / koreksi
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