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[BUG/PRB.] VFP 9.0 FIX - THE DELAY TIME IN MILLISECONDS AFTER CLOSE FILE
January 2024
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CCB
1. BUG:
In vfp9 (and vfp6, vfp7, vfp8), there are some compatible problems for the close file command on Windows Vista or later.
2. CAUSE:
There are some compatible problems when the close file command calls the CloseHandle Windows API
for the Windows Defender program or the antivirus programs.
Now after the close file command calls the CloseHandle Windows API,
it will delay the user-specified time in milliseconds.
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Fun42ddf2 :: ; proc near
push ebp ;0x0042ddf2 : 55
lea ebp , dword ptr [ esp + 0FFFFFE70h ] ;0x0042ddf3 : 8dac2470feffff
sub esp , 0268h ;0x0042ddfa : 81ec68020000
mov eax , dword ptr [ Data937090 ] ;0x0042de00 : a190709300
push ebx ;0x0042de05 : 53
push esi ;0x0042de06 : 56
mov dword ptr [ ebp + 018Ch ] , eax ;0x0042de07 : 89858c010000
mov eax , dword ptr [ Data937108 ] ;0x0042de0d : a108719300
push edi ;0x0042de12 : 57
mov edi , ecx ;0x0042de13 : 8bf9
cmp edi , eax ;0x0042de15 : 3bf8
mov dword ptr [ ebp + 120 ] , edi ;0x0042de17 : 897d78
mov dword ptr [ ebp + 124 ] , 00h ;0x0042de1a : c7457c00000000
jnb Label57ffd7 ;0x0042de21 : 0f83b0211500
mov ecx , dword ptr [ Data93757c ] ;0x0042de27 : 8b0d7c759300
mov ebx , edi ;0x0042de2d : 8bdf
imul ebx , ebx , 038h ;0x0042de2f : 6bdb38
mov al , byte ptr [ ebx + ecx + 44 ] ;0x0042de32 : 8a440b2c
add ebx , ecx ;0x0042de36 : 03d9
test al , 01h ;0x0042de38 : a801
je Label57ffe1 ;0x0042de3a : 0f84a1211500
mov eax , dword ptr [ ebx + 52 ] ;0x0042de40 : 8b4334
test eax , eax ;0x0042de43 : 85c0
mov esi , ebx ;0x0042de45 : 8bf3
mov dword ptr [ ebp + 080h ] , esi ;0x0042de47 : 89b580000000
jne Label5501a0 ;0x0042de4d : 0f854d231200
Label42de53 ::
test byte ptr [ ebx + 8 ] , 010h ;0x0042de53 : f6430810
jne Label42dff4 ;0x0042de57 : 0f8597010000
lea edx , dword ptr [ ebp + 116 ] ;0x0042de5d : 8d5574
lea eax , dword ptr [ ebp + 0FFFFFF78h ] ;0x0042de60 : 8d8578ffffff
call Fun42c27f ;0x0042de66 : e814e4ffff
pushd 00h ;0x0042de6b : 6a00
push eax ;0x0042de6d : 50
call Fun42c2be ;0x0042de6e : e84be4ffff
add esp , 08h ;0x0042de73 : 83c408
test eax , eax ;0x0042de76 : 85c0
mov dword ptr [ ebp + 124 ] , eax ;0x0042de78 : 89457c
jne Label42de91 ;0x0042de7b : 7514
mov esi , dword ptr [ ebp + 120 ] ;0x0042de7d : 8b7578
push esi ;0x0042de80 : 56
call Fun431d6c ;0x0042de81 : e8e63e0000
test eax , eax ;0x0042de86 : 85c0
je Label42de91 ;0x0042de88 : 7407
mov eax , esi ;0x0042de8a : 8bc6
call Fun42dd40 ;0x0042de8c : e8affeffff
Label42de91 ::
mov eax , dword ptr [ Data937220 ] ;0x0042de91 : a120729300
lea ecx , dword ptr [ ebp + 0FFFFFF78h ] ;0x0042de96 : 8d8d78ffffff
cmp ecx , eax ;0x0042de9c : 3bc8
jne Label580038 ;0x0042de9e : 0f8594211500
mov edx , dword ptr [ Data937220 ] ;0x0042dea4 : 8b1520729300
mov eax , dword ptr [ edx + 76 ] ;0x0042deaa : 8b424c
cmp dword ptr [ ebp + 116 ] , eax ;0x0042dead : 394574
mov dword ptr [ Data937220 ] , eax ;0x0042deb0 : a320729300
jne Label580042 ;0x0042deb5 : 0f8587211500
lea edx , dword ptr [ ebp + 112 ] ;0x0042debb : 8d5570
lea eax , dword ptr [ ebp - 56 ] ;0x0042debe : 8d45c8
call Fun42c27f ;0x0042dec1 : e8b9e3ffff
pushd 00h ;0x0042dec6 : 6a00
push eax ;0x0042dec8 : 50
call Fun42c2be ;0x0042dec9 : e8f0e3ffff
mov esi , eax ;0x0042dece : 8bf0
add esp , 08h ;0x0042ded0 : 83c408
test esi , esi ;0x0042ded3 : 85f6
jne Label42defd ;0x0042ded5 : 7526
mov edi , dword ptr [ ebp + 080h ] ;0x0042ded7 : 8bbd80000000
mov eax , dword ptr [ edi + 44 ] ;0x0042dedd : 8b472c
test byte ptr ah , 01h ;0x0042dee0 : f6c401
je Label58004c ;0x0042dee3 : 0f8463211500
Label42dee9 ::
mov edi , dword ptr [ edi + 40 ] ;0x0042dee9 : 8b7f28
push edi ;0x0042deec : 57
call CloseHandle ;0x0042deed : ff15f0719100
;
; -----------------------------------------------------------------------
; VFP 9.0 FIX - THE DELAY TIME IN MILLISECONDS AFTER CLOSE FILE
; December 2020
; -----------------------------------------------------------------------
; CCB
;
; The delay time in milliseconds after close file.
;
; 2020/12/26, by ccb
;
cmp dword ptr vfpa_sys9046_data,00h
jle Label42def3
push eax
push dword ptr vfpa_sys9046_data
call Sleep
pop eax
Label42def3 ::
neg eax ;0x0042def3 : f7d8
sbb eax , eax ;0x0042def5 : 1bc0
inc eax ;0x0042def7 : 40
call Label42d319 ;0x0042def8 : e81cf4ffff
Label42defd ::
mov ecx , dword ptr [ Data937220 ] ;0x0042defd : 8b0d20729300
lea eax , dword ptr [ ebp - 56 ] ;0x0042df03 : 8d45c8
cmp eax , ecx ;0x0042df06 : 3bc1
jne Label580057 ;0x0042df08 : 0f8549211500
mov ecx , dword ptr [ Data937220 ] ;0x0042df0e : 8b0d20729300
mov eax , dword ptr [ ecx + 76 ] ;0x0042df14 : 8b414c
mov ecx , dword ptr [ ebp + 112 ] ;0x0042df17 : 8b4d70
Label42df1a ::
cmp ecx , eax ;0x0042df1a : 3bc8
mov dword ptr [ Data937220 ] , eax ;0x0042df1c : a320729300
jne Label580061 ;0x0042df21 : 0f853a211500
mov eax , dword ptr [ ebp + 124 ] ;0x0042df27 : 8b457c
test eax , eax ;0x0042df2a : 85c0
jne Label42df36 ;0x0042df2c : 7508
test esi , esi ;0x0042df2e : 85f6
jne Label58006b ;0x0042df30 : 0f8535211500
Label42df36 ::
mov esi , dword ptr [ ebp + 080h ] ;0x0042df36 : 8bb580000000
Label42df3c ::
mov eax , dword ptr [ ebp + 124 ] ;0x0042df3c : 8b457c
xor edi , edi ;0x0042df3f : 33ff
cmp eax , edi ;0x0042df41 : 3bc7
jne Label580073 ;0x0042df43 : 0f852a211500
Label42df49 ::
mov ecx , dword ptr [ esi + 12 ] ;0x0042df49 : 8b4e0c
call Fun42c1e2 ;0x0042df4c : e891e2ffff
mov dword ptr [ esi + 12 ] , edi ;0x0042df51 : 897e0c
mov ecx , dword ptr [ esi + 16 ] ;0x0042df54 : 8b4e10
call Fun42c1e2 ;0x0042df57 : e886e2ffff
mov ecx , dword ptr [ esi + 20 ] ;0x0042df5c : 8b4e14
mov dword ptr [ esi + 16 ] , edi ;0x0042df5f : 897e10
call Fun42c1e2 ;0x0042df62 : e87be2ffff
mov dword ptr [ esi + 20 ] , edi ;0x0042df67 : 897e14
mov edi , dword ptr [ Data93710c ] ;0x0042df6a : 8b3d0c719300
test edi , edi ;0x0042df70 : 85ff
je Label42df91 ;0x0042df72 : 741d
Label42df74 ::
mov ebx , dword ptr [edi] ;0x0042df74 : 8b1f
mov edx , dword ptr [ ebp + 120 ] ;0x0042df76 : 8b5578
mov eax , dword ptr [ ebx + 4 * edx + 0178h ] ;0x0042df79 : 8b849378010000
test eax , eax ;0x0042df80 : 85c0
jne Label516af2 ;0x0042df82 : 0f856a8b0e00
Label42df88 ::
mov ecx , dword ptr [edi] ;0x0042df88 : 8b0f
mov edi , dword ptr [ ecx + 12 ] ;0x0042df8a : 8b790c
test edi , edi ;0x0042df8d : 85ff
jne Label42df74 ;0x0042df8f : 75e3
Label42df91 ::
mov ecx , dword ptr [ esi + 44 ] ;0x0042df91 : 8b4e2c
mov eax , dword ptr [ Data937774 ] ;0x0042df94 : a174779300
and ecx , 0FFFFF3FEh ;0x0042df99 : 81e1fef3ffff
cmp esi , eax ;0x0042df9f : 3bf0
mov dword ptr [ esi + 44 ] , ecx ;0x0042dfa1 : 894e2c
mov dword ptr [ esi + 52 ] , 00h ;0x0042dfa4 : c7463400000000
je Label42dfd0 ;0x0042dfab : 7423
Label42dfad ::
mov ecx , dword ptr [ ebp + 124 ] ;0x0042dfad : 8b4d7c
test ecx , ecx ;0x0042dfb0 : 85c9
jne Label580080 ;0x0042dfb2 : 0f85c8201500
mov ecx , dword ptr [ ebp + 018Ch ] ;0x0042dfb8 : 8b8d8c010000
call Fun42bf1d ;0x0042dfbe : e85adfffff
pop edi ;0x0042dfc3 : 5f
pop esi ;0x0042dfc4 : 5e
pop ebx ;0x0042dfc5 : 5b
add ebp , 0190h ;0x0042dfc6 : 81c590010000
mov esp , ebp ;0x0042dfcc : 8be5
pop ebp ;0x0042dfce : 5d
ret ;0x0042dfcf : c3
4. APPLIES TO:
VFP 6.0.8167.0
VFP 6.0.8961.0 (SP5)
VFP 7.0.0.9262
VFP 7.0.0.9465 (SP1)
VFP 8.0.0.2521
VFP 8.0.0.3117 (SP1)
VFP 9.0.0.2412
VFP 9.0.0.3504 (SP1)
VFP 9.0.0.4611 (SP2)
VFP 9.0.0.5015 (SP2)
VFP 9.0.0.5411 (SP2)
VFP 9.0.0.5721 (SP2)
VFP 9.0.0.5815 (SP2)
VFP 9.0.0.6303 (SP2)
VFP 9.0.0.6602 (SP2)
VFP 9.0.0.7423 (SP2)
The bug has been fixed in VFP Advanced.
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
http://www.baiyujia.com/vfpdocuments/f_vfp9fix143.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix65.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix66.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix67.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix68.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix69.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix70.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix71.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix72.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix73.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix74.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix84.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix85.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix107.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix108.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix109.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix110.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix145.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix146.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix147.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix148.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix149.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix150.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix203.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix261.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix262.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix269.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix270.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix278.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix279.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix348.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix349.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix350.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix351.asp
2, microsoft.com:
https://devblogs.microsoft.com/oldnewthing/20120907-00/?p=6663
6. OTHER:
For reference only, there is no guarantees.
Any questions or suggestions, please send me an email at ccb2000@163.com.
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