[solved]COMBOBOXINFO

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Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 11:47

Code:

.data
        struct COMBOBOXINFO
                cbSize          dd ?
                rcItem          RECT
                rcButton        RECT
                stateButton     dd ?
                hwndCombo       dq ?
                hwndItem        dq ?
                hwndList        dq ?
        ends
        PRESETS_info COMBOBOXINFO sizeof.COMBOBOXINFO
.code
        invoke          GetDlgItem,[hWnd],IDC_PRESETS
        invoke          GetComboBoxInfo,rax,PRESETS_info

What is wrong with my COMBOBOXINFO? Is values sizes correct? LastError shows: Invalid access to memory location. First invoke returns handle as requested.

Last edited by Overclick on 27 Aug 2020, 19:34; edited 1 time in total

27 Aug 2020, 11:47

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 27 Aug 2020, 11:50

Yo didn't show all the code so we have to guess you are using 64-bit code? Right?

If so then stateButton being a single dword will unalign all the following values. You could try "stateButton dd ?,?" to make it fill the full qword.

27 Aug 2020, 11:50

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 11:55

Yes it is 64 bit as all present handles is qword. I tried your advice, still the same error.

27 Aug 2020, 11:55

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 12:08

I tried to force the size as 100. Also tried to use struc instead of struct...

27 Aug 2020, 12:08

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 27 Aug 2020, 13:07

And cbSize.

We can't see RECT, so maybe there also.

27 Aug 2020, 13:07

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 13:20

RECT provided by Fasm\INCLUDE\EQUATES\USER64.INC
I tried that value too. Any way, it needs the size only whatever how I manage structure inside. I gived to it 100 bytes will try to give more. I don't use it's names yet. Windows manage it by shifting no matter how I manage parts of it.
Don't you think I have to enable something or SetComboBoxInfo first?..
I need few minutes to return for that search...

27 Aug 2020, 13:20

Roman

Joined: 21 Apr 2012
Posts: 1839

Roman 27 Aug 2020, 13:27

Maybe try create window and children combobox window ?

Code:

CreateWindow("combobox", "Cppkdkd", 
                                    WS_CHILD | WS_VISIBLE | CBS_AUTOHSCROLL,
                                    250, 50, 80, 150, 
                                    hWnd, 0, hInstance, NULL);

And not get combobox from dialog.

Last edited by Roman on 27 Aug 2020, 13:29; edited 1 time in total

27 Aug 2020, 13:27

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 27 Aug 2020, 13:29

If you showed some code people can run then they might be able to help you better. We have to take your word that it is the stuct above causing the problem, but perhaps the problem is somewhere else.

27 Aug 2020, 13:29

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 13:45

My code about 62 kbytes. You can use some dialog template to test it. I was hoping the problem would be immediately apparent...

27 Aug 2020, 13:45

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 27 Aug 2020, 13:50

Don't post all your code. Just a minimal example showing the problem.

27 Aug 2020, 13:50

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 13:51

So I did ))

27 Aug 2020, 13:51

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20430
Location: In your JS exploiting you and your system

revolution 27 Aug 2020, 13:52

Overclick wrote:

So I did ))

You posted something we can't compile.

27 Aug 2020, 13:52

Roman

Joined: 21 Apr 2012
Posts: 1839

Roman 27 Aug 2020, 14:14

Quote:

So I did ))

Congratulation Smile

You do super combo to win api !

27 Aug 2020, 14:14

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 14:19

There is an other way to do the same by CB_GETCOMBOBOXINFO. I'll check if it returns anything.

27 Aug 2020, 14:19

ProMiNick

Joined: 24 Mar 2012
Posts: 803
Location: Russian Federation, Sochi

ProMiNick 27 Aug 2020, 14:32

Such tasks I usualy solve by looking for prey program that already use needed imports. In current case imports should have GetComboBoxInfo, disasm it and analize what structure contents are passed to it, maybe analize code around it and get knowledge about offsets of other struct members,

27 Aug 2020, 14:32

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 15:16

That is all I can see

Description:
Filesize:	2.31 KB
Viewed:	12209 Time(s)

27 Aug 2020, 15:16

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 27 Aug 2020, 19:33

Ok...
Function doesn't works at all. But message request is ok Very Happy

Solution:

Code:

.data
        struct COMBOBOXINFO
                cbSize          dd ?
                rcItem          RECT
                rcButton        RECT
                stateButton     dd ?
                hwndCombo       dq ?
                hwndItem        dq ?
                hwndList        dq ?
        ends
        PRESETS_info COMBOBOXINFO sizeof.COMBOBOXINFO
        CB_GETCOMBOBOXINFO      = 0164h
.code
        invoke SendDlgItemMessage,[hWnd],IDC_PRESETS,\
                CB_GETCOMBOBOXINFO,0,PRESETS_info

27 Aug 2020, 19:33

Roman

Joined: 21 Apr 2012
Posts: 1839

Roman 30 Aug 2020, 04:47

Maybe using dialogbox, try create separately combobox window(let say hwndCombo1) !
And work with hwndCombo1.
Plus hwndCombo1 work parallel to DialogBox !
And easy to do tricks(show\hidden\change font and size\apply or delet names) with hwndCombo1 window.
And you might create combobox list !
https://lh3.googleusercontent.com/proxy/nlav8u8JUMd5uB-2xY78R_4PZzH5HgW8gLdgnt37SpDEGpcwYTjPX_uxhpsdIcr9ypp7IM0Cic3z2GkOJg

https://www.sourcecodester.com/sites/default/files/untitled-1_7.png

invoke SendMessage,[hwndCombo1],WM_GETTEXT,50,ReciveTxtBuffer

50 means get 50 symbols from hwndCombo1

SendTxtBuffer db 'Send this text to combobox and quikly !',0
invoke SendMessage,[hwndCombo1],WM_SETTEXT,0,SendTxtBuffer

30 Aug 2020, 04:47

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