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C++ PMX to Delphi PMX

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dnsi0
I post too much

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Joined: 04 Jan 2007
Posts: 2674

Posted: Sat Aug 09, 2008 7:38 pm Post subject: C++ PMX to Delphi PMX

So I tryed to convert the dll. So I was wondering would this work:

Code:

function PostMessageX(
hWnd:HWND;
MSG:UINT;
WPARAM:wParam;
LPARAM:lParam):BOOL;stdcall;
var
PMA:pointer;
adr:cardinal;
Begin
PMA:=GetProcAddress(LoadLibrary('USER32.DLL'),'PostMessageA');
asm
mov eax,PMA
add eax,5
mov adr,eax
end;
asm
mov edi, edi
push ebp
mov ebp, esp
jmp PMA
end;
end;

And Im having trouble exporting it so... Can't test it.

slippppppppp
Grandmaster Cheater

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Joined: 08 Aug 2006
Posts: 929

Posted: Sat Aug 09, 2008 8:21 pm Post subject:

Edit* Oopps sorry.

Code:

function PostMessageX( Wnd:HWND; MSG:UINT; WPARAM:wP; LPARAM: lP ):BOOL;stdcall;
var
PMA: ULONG;
Begin
PMA:= (DWORD( GetProcAddress(LoadLibrary('USER32.DLL'),'PostMessageA'))) + 5;
asm
mov edi, edi
push ebp
mov ebp, esp
jmp PMA
end;
end;

Last edited by slippppppppp on Sun Aug 10, 2008 12:11 pm; edited 1 time in total

rapion124
Grandmaster Cheater Supreme

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Joined: 25 Mar 2007
Posts: 1095

Posted: Sat Aug 09, 2008 8:46 pm Post subject:

@slippppppppp:
You should initialize the re-entry address during initialization. It's more efficient that way.

Code:

DWORD dwPostMessageA = DWORD(GetProcAddress(GetModuleHandle("user32.dll"), "PostMessageA"));
DWORD dwPostMessageAR = dwPostMessageA + 5;

__declspec(naked) BOOL WINAPI __stdcall PostMessageAT( HWND hWnd, UINT Msg, LPARAM lParam, WPARAM wParam)
{
__asm
{
mov edi, edi
push ebp
mov ebp, esp
jmp [dwPostMessageAR]
}
}

With Delphi, add the assembler directive to the prototype.

GMZorita
Grandmaster Cheater Supreme

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Joined: 21 Mar 2007
Posts: 1361

Posted: Sun Aug 10, 2008 6:04 am Post subject:

You guys do realize that you dont need the:

Code:

mov edi, edi

Right?
_________________

Gone

rapion124
Grandmaster Cheater Supreme

Reputation: 0

Joined: 25 Mar 2007
Posts: 1095

Posted: Sun Aug 10, 2008 7:57 am Post subject:

GMZorita wrote:

You guys do realize that you dont need the:

Code:

mov edi, edi

Right?

It's a place holder so the bytes align to 5 for hot patching. So? Doesn't hurt to include it. Who knows, you might want to hook your own hook lolz.

Reak
I post too much

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Joined: 15 May 2007
Posts: 3496

Posted: Sun Aug 10, 2008 8:41 am Post subject:

Code:

function PMH(hWnd:HWND;MSG:UINT;WPARAM:wParam;LPARAM:lParam):BOOL; stdcall;
asm
jmp @start
@dllhk: db 'user32.dll',0
@cmd: db 'PostMessageA',0
@start:
lea eax, @dllhk
push eax
call LoadLibraryA
lea ecx, @cmd
push ecx
push eax
call GetProcAddress
add eax,5
jmp eax
end;

Some guy helped me with this though.

Anden100
Grandmaster Cheater

Reputation: 0

Joined: 20 Apr 2007
Posts: 668

Posted: Sun Aug 10, 2008 9:29 am Post subject:

rEakW0n wrote:

Code:

Some guy helped me with this though.

Kinda messy with so much asm O.o, ive been using this for ages:

Code:

function PMX(
hWnd:HWND;
MSG:UINT;
WPARAM:wParam;
LPARAM:lParam):BOOL;stdcall;
var DblWord:DWORD;
hHandle:THandle;
begin
hHandle:=LoadLibrary('user32.dll');
DblWord:=DWORD(GetProcAddress(hHandle,'PostMessageA'))+5;
asm
mov edi,edi
push ebp
mov esp,ebp
jmp [DblWord]
end;
end;

dnsi0
I post too much

Reputation: 0

Joined: 04 Jan 2007
Posts: 2674

Posted: Sun Aug 10, 2008 12:08 pm Post subject:

slippppppppp wrote:

Edit* Oopps sorry.

Code:

function PostMessageX( Wnd:HWND; MSG:UINT; WPARAM:wP; LPARAM: lP ):BOOL;stdcall;
var
PMA: ULONG;
Begin
PMA:=GetProcAddress(LoadLibrary('USER32.DLL'),'PostMessageA') + 5;
asm
mov edi, edi
push ebp
mov ebp, esp
jmp PMA
end;
end;

Edit: Oh sorry ddn't see u made it into dword.

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