Recent posts

#31

Assembly discussions / Re: Enumerating top level wind...

Last post by TimoVJL - December 06, 2025, 04:32:20 AM

More fun, eliminate wsprintf and buffer2

Code Select Expand

    invoke  GetWindowText,hwnd,ADDR buffer,64
    cmp     eax,0
    je      @f
    mov     WORD PTR[buffer+eax], 0A0Dh
    add     eax, 2
    invoke  WriteFile, hStdOut, ADDR buffer, eax, 0, 0
@@:


#32

Assembly discussions / Re: Enumerating top level wind...

Last post by Vortex - December 05, 2025, 08:58:52 PM

Hi Timo,

Here is the new version eliminating the extra branching :

Code Select Expand

include     EnumWnd.inc

.data

f1          db '%s',13,10,0
ZeroVal     dd 0
ZeroPtr     dd OFFSET ZeroVal

.data?

hStdOut dd ?
buffer      db 128 dup(?)
buffer2     db 128 dup(?)

.code

start:

    invoke  GetStdHandle, STD_OUTPUT_HANDLE
    mov     hStdOut,eax
    invoke  EnumWindows,ADDR EnumWndProc,0
    invoke  ExitProcess,0
   

EnumWndProc PROC USES ebx hwnd:DWORD,lParam:DWORD

    mov     ebx,OFFSET buffer2
    invoke  GetWindowText,hwnd,ADDR buffer,64
    invoke  wsprintf,ebx,ADDR f1,ADDR buffer
    cmp     eax,2
    cmovz   ebx,DWORD PTR [ZeroPtr]
    invoke  WriteFile,hStdOut,ebx,eax,0,0
    mov     eax,1
    ret

EnumWndProc ENDP

END start


#33

Tips & tricks / Re: Testing Console

Last post by TimoVJL - December 05, 2025, 10:46:12 AM

Those Windows console variations are interesting.
It seems, that they don't have normal message loop for user.
A console window handle isn't real windows handle at all.

That test is stupid, as it don't handle any errors, like empty window handle.

#34

Tips & tricks / Re: Testing Console

Last post by Vortex - December 05, 2025, 09:48:19 AM

Hi Timo,

Here is my report. Operating system at work : Windows 11 2024 H2

Code Select Expand

D:\PellesC\ConsoleTest>ConsoleTest.exe
hConWnd 00000000000708E8h
CTitle: Administrator: C:\Windows\System32\cmd.exe - ConsoleTest.exe
WTitle:
hWnd 0000000000010174h
WndProc 0000000000000000h
WndProc 0000000000000000h


#35

Assembly discussions / Re: Enumerating top level wind...

Last post by TimoVJL - December 05, 2025, 09:24:58 AM

I was after something like this

Code Select Expand

include     EnumWnd.inc
includelib user32.lib

STD_OUTPUT_HANDLE equ -11

GetStdHandle PROTO :DWORD
WriteFile PROTO :DWORD,:DWORD,:DWORD,:DWORD,:DWORD

.data

f1          db '%s',13,10,0

.data?

hStdOut dd ?
buffer      db 128 dup(?)
buffer2     db 128 dup(?)

.code

start:
    invoke  GetStdHandle, STD_OUTPUT_HANDLE
    mov     hStdOut, eax
    invoke  EnumWindows,ADDR EnumWndProc,0
    invoke  ExitProcess,0
   

EnumWndProc PROC hwnd:DWORD,lParam:DWORD
    invoke  GetWindowText,hwnd,ADDR buffer,64
    invoke  wsprintf,ADDR buffer2,ADDR f1,ADDR buffer
    cmp     eax,2
    je      @f
invoke  WriteFile, hStdOut, ADDR buffer2, eax, 0, 0
@@:
    mov     eax,1
    ret

EnumWndProc ENDP

END start


#36

Expert questions / Re: Controls 'extra data'

Last post by Robert - December 05, 2025, 03:14:17 AM

Hi John Z:

Thanks. Got it.

#37

User contributions / Re: Simple resizer Library

Last post by Robert - December 05, 2025, 03:10:50 AM

Hi John Z:

Thank you. The demo will be very helpful for those of us trying to understand how the library is implemented.

For me, the demo is absolutely essential. Without it, I couldn't even begin.

#38

Beginner questions / Re: Different results, Debug v...

Last post by PhilG57 - December 05, 2025, 12:35:52 AM

Thanks. No debug interface demo add-on installed.  It seems that setting breakpoints and poking around at a breakpoint is what is causing problems.  I'll keep playing with it.

#39

Tips & tricks / Re: Testing Console

Last post by TimoVJL - December 04, 2025, 10:35:47 PM

Windows 11 Home 25H2

#40

Tips & tricks / Re: Testing Console

Last post by Vortex - December 04, 2025, 10:06:32 PM

Hi Timo,

What is the exact version of your Windows 11 installation ? For example, is it Windows 11 2024 H2 ?