Here is a sample program that I wrote more than 20 years ago a login security program that I wrote using Clipper Summer '87 I hope you find my work useful.
My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
My telephone number at home here in Bacolod City, Negros Occidental is (034) 4335675.
Program Listing
login.prg
save screen to sPassword
clear
cUser = space(10)
cPwds = 'fctc bacolod ±'
nTrys = 0
@ 10,27 say 'ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ '
@ 11,27 say '³ Login User : ³Û'
@ 12,27 say '³ Password : ³Û'
@ 13,27 say 'ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙÛ'
@ 14,27 say ' ßßßßßßßßßßßßßßßßßßßßßßßßßß'
do while .t.
set color to w/n,w/n,,,w/n
@ 11,42 get cUser valid .not. empty(cUser)
read
if lastkey() = 27
lAccess = .f.
exit
endif
set confirm on
set color to x/x
set cursor off
set intensity off
cKeys = space(10)
@ 12,42 get cKeys picture '@S1' valid .not. chr(177) $ cKeys
read
set confirm off
set color to
set cursor on
set intensity on
nTrys = iif(lastkey()#27,nTrys+1,nTrys)
do case
case lastkey() = 27
lAccess = .f.
exit
case cUser+cKeys $ cPwds
select 100
use users
locate for user = cUser
if .not. found()
append blank
endif
replace user with cUser,;
date with date(),;
time with time()
lAccess = .t.
exit
case nTrys > 2
clear
set color to w+
@ 12,27 say 'A C C E S S D E N I E D ...'
set colo to
tone(300,1)
tone(499,5)
tone(700,5)
inkey(5)
lAccess = .f.
exit
endcase
enddo
restore screen from sPassword
return
* --- EOF
