[solved] NMHDR NMBCDROPDOWN etc

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Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 26 Aug 2020, 15:28

Hi
How can I declare and use this structure names if it's address unknown until windows send it by WM_NOTIFY in lParam?
I doing it brytally for now:

Code:

wm_notify:
        mov             eax,[r9+16]                ;   [StrucName.code]
        cmp             eax,BCN_DROPDOWN
        je              bcn_dropdown
        xor             rax,rax
        ret
        bcn_dropdown:
                mov             eax,[r9+8]              ;    [StrucName.idFrom]
                cmp             eax,IDC_Button
...

I wish to use declared names as marked in comments

Last edited by Overclick on 26 Aug 2020, 18:11; edited 1 time in total

26 Aug 2020, 15:28

bitRAKE

Joined: 21 Jul 2003
Posts: 4060
Location: vpcmpistri

bitRAKE 26 Aug 2020, 16:59

mov [r9+NMHDR.code]

if the offsets for the structure is not defined, then:

Code:

virtual at 0
NMHDR NMHDR
end virtual

...will define them. IIRC, the struct macro defines them. It's like they are identity mapped to a structure of their own name at zero.

_________________
¯\(°_o)/¯ “languages are not safe - uses can be” Bjarne Stroustrup

26 Aug 2020, 16:59

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 26 Aug 2020, 18:10

Nice thanks

26 Aug 2020, 18:10

Roman

Joined: 21 Apr 2012
Posts: 1840

Roman 26 Aug 2020, 18:18

What if struct do like this ? :

Code:

StrucName.code EQU 16
StrucName.idFrom EQU 8

26 Aug 2020, 18:18

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 26 Aug 2020, 18:29

Roman, NMHDR is already in fasm includes but why not. I was looking for some universal metod to do it once for all.

26 Aug 2020, 18:29

bitRAKE

Joined: 21 Jul 2003
Posts: 4060
Location: vpcmpistri

bitRAKE 26 Aug 2020, 19:22

Code:

virtual at r9
nmhdr NMHDR
end virtual

mov eax,[nmhdr.code]

Is also possible, and might reduce confusion when working with several similar structures. It all depends on what you prefer to look at.

_________________
¯\(°_o)/¯ “languages are not safe - uses can be” Bjarne Stroustrup

26 Aug 2020, 19:22

Overclick

Joined: 11 Jul 2020
Posts: 669
Location: Ukraine

Overclick 26 Aug 2020, 19:36

bitRAKE, Will it take current r9 every time? Then it is awesome!

26 Aug 2020, 19:36

revolution
When all else fails, read the source

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

revolution 26 Aug 2020, 22:52

If I have a structure instantiation that uses a fixed register I like to show it in the name to avoid confusion and to help me six months later when I come back to the code.

Code:

virtual at r9
nmhdr@r9 NMHDR
end virtual

26 Aug 2020, 22:52

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