Converting MASM code

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TmX

Joined: 02 Mar 2006
Posts: 843
Location: Jakarta, Indonesia

TmX 18 Jan 2009, 14:36

This is a code about autotyping, written in MASM

Code:

.386
.model flat,stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.data
msg db 'Hello Netters in Hanjian Site (http://hanjian.web.id)',13,10
db 'Ini adalah Contoh AutoType with MASM32. ',0
app db 'notepad.exe',0
wndclass db 'Notepad',0
childclass db 'Edit',0

.data?
handle dd ?

.code
start:

invoke WinExec,ADDR app,SW_SHOW
invoke FindWindow,ADDR wndclass,0
invoke FindWindowEx,eax,0,ADDR childclass,0
mov handle,eax
mov edx,OFFSET msg
@@:
xor eax,eax
mov al,byte PTR [edx]
or al,al
jz @f
push edx
invoke SendMessage,handle,WM_CHAR,eax,0
invoke Sleep,200
pop edx
inc edx
jmp @b
@@:
invoke ExitProcess,0

END start

It's taken from here:
http://www.hanjian-oke.co.cc/2008/08/autotype-with-asm-by-hanjian.html

This is my attempt to translate it to FASM:

Code:

format PE console 4.0
entry start

include 'win32a.inc'
include 'api/kernel32.inc'
include 'api/user32.inc'

section '.data' data readable writeable
        msg db 'Hello Netters in Hanjian Site (http://hanjian.web.id)',13,10
      db 'Ini adalah Contoh AutoType with FASM ',0
    app db 'notepad.exe',0
    wndclass db 'Notepad',0
   childclass db 'Edit',0
    handle dd ?

section '.code' code readable executable
start:
 invoke WinExec,addr app,SW_SHOW
     invoke FindWindow,addr wndclass,0
   invoke FindWindowEx,eax,0,addr childclass,0
 mov eax,handle
      mov edx,msg
@@:
      xor eax,eax
 mov al,byte ptr [edx]
       or al,al
    ja @f
       push edx
    invoke SendMessage,handle,WM_CHAR,eax,0
     invoke Sleep,200
    pop edx
     inc edx
     jmp @b

@@:
       invoke ExitProcess,0

section '.idata' import data readable writeable
library kernel32,'kernel32.dll',user32,'user32.dll'

import kernel32,WinExec,'WinExec',\
                Sleep,'Sleep',\
                ExitProcess,'ExitProcess'
import user32,FindWindow,'FindWindow',\
                     FindWindowEx,'FindWindowEx',\
              SendMessage,'SendMessage'

When I tried to compile it, FASM said:

Quote:

flat assembler version 1.67.29 (1267045 kilobytes memory)
typist.asm [25]:
mov al,byte ptr [edx]
error: invalid expression.

How to fix that? Confused

18 Jan 2009, 14:36

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4623
Location: Argentina

LocoDelAssembly 18 Jan 2009, 15:01

Code:

  mov al, byte [edx] ; or just mov al, [edx] since "byte" is implicit

18 Jan 2009, 15:01

Neutrino

Joined: 18 Dec 2008
Posts: 2

Neutrino 18 Jan 2009, 17:50

Hi, Tmx!
To get your application work correctly, you also should make some changes in your code:

Code:

format PE console 4.0 entry start include 'win32a.inc' section '.data' data readable writeable         msg db 'Hello Netters in Hanjian Site (http://hanjian.web.id)',13,10             db 'Ini adalah Contoh AutoType with FASM ',0     app db 'notepad.exe',0         wndclass db 'Notepad',0         childclass db 'Edit',0         handle dd ? section '.code' code readable executable start:         invoke WinExec,app,SW_SHOW         invoke FindWindow,wndclass,0         invoke FindWindowEx,eax,0,childclass,0         mov [handle],eax         mov edx,msg @@:         xor eax,eax         mov al,byte[edx]         or al,al         jz @f         push edx         invoke SendMessage,[handle],WM_CHAR,eax,0         invoke Sleep,200         pop edx         inc edx         jmp @b @@:         invoke ExitProcess,0 section '.idata' import data readable writeable library kernel32,'kernel32.dll',user32,'user32.dll' import kernel32,WinExec,'WinExec',\                 Sleep,'Sleep',\                 ExitProcess,'ExitProcess' import user32,FindWindow,'FindWindowA',\                           FindWindowEx,'FindWindowExA',\               SendMessage,'SendMessageA'

Read FASM manuals for more information Wink

_________________
= )

18 Jan 2009, 17:50

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