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Snootae
Grandmaster Cheater

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Joined: 16 Dec 2006
Posts: 969
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Posted: Mon Apr 07, 2008 4:21 am Post subject: C++ postmessage

so i've patched my function:

Code:

DWORD dwPM = (DWORD)GetProcAddress( LoadLibrary( _T("user32.dll") ), "PostMessageA" ) + 5;
_declspec(naked) BOOL WINAPI PMX( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
_asm
{
mov edi,edi
push ebp
mov ebp,esp
jmp dword ptr ds:[dwPM]
}
}

then made a function for it

Code:

void sendshit(INT key)
{
mswin = FindWindowW(L"MapleStoryClass", NULL);
lParam = MapVirtualKey(key,0);
lParam <<= 16;

PMX(mswin,WM_KEYDOWN,key,lParam);
Sleep(10);
PMX(mswin,WM_KEYUP,key,lParam);
}

and when i try sendshit(0x5A) or (0x11); maplestory dies, anyone know why this would be happening? im stuck
_________________

Fun fun fun, give it a go!

atom0s
Moderator

Reputation: 205

Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1

Posted: Mon Apr 07, 2008 5:13 am Post subject:

From looking at the other posts about this, shouldn't the MapVirtualKey call look like this instead?:

Code:

int iMappedKey = (MapVirtualKey(lParam, 0) << 16) & 0x00FF0000;

lParam being the keycode.
_________________

- Retired.

Snootae
Grandmaster Cheater

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Joined: 16 Dec 2006
Posts: 969
Location: --->

Posted: Mon Apr 07, 2008 5:17 am Post subject:

ahh, will try that, but whats the 0x00FF0000 for? _________________ Fun fun fun, give it a go!

atom0s
Moderator

Reputation: 205

Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1

Posted: Mon Apr 07, 2008 6:05 am Post subject:

If I recall correctly from what I read somewhere it deals with the 'state' of the key. 0x00FF0000 being the 'down' state. (I don't remember for sure so don't quote me on that.) _________________ - Retired.

Snootae
Grandmaster Cheater

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Joined: 16 Dec 2006
Posts: 969
Location: --->

Posted: Mon Apr 07, 2008 6:15 am Post subject:

ok, i tried it though, still closes maple instantly _________________ Fun fun fun, give it a go!

Symbol
I'm a spammer

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Joined: 18 Apr 2007
Posts: 5094
Location: Israel.

Posted: Mon Apr 07, 2008 8:42 am Post subject:

Wiccaan wrote:

If I recall correctly from what I read somewhere it deals with the 'state' of the key. 0x00FF0000 being the 'down' state. (I don't remember for sure so don't quote me on that.)

Isn't it 0x80000000 for 'key down'?

Snootae
Grandmaster Cheater

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Joined: 16 Dec 2006
Posts: 969
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Posted: Tue Apr 08, 2008 5:08 am Post subject:

well i tried that too, still closes maple, this makes no fucking sense _________________ Fun fun fun, give it a go!

4ng3licDew
Cheater

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Joined: 14 Feb 2008
Posts: 28

Posted: Wed Apr 09, 2008 9:56 am Post subject:

I coded my program using Microsoft Visual Studio C++ 6, windows XP SP2 32bits, and it works.

You use FindWindowW. I looked it up and it is for Windows 95/98/Me.

Here is my code which I have posted a while back on this forum.

Code:

#include <windows.h>

#define LENGTH 30
#define ID_TIMER1 2
#define ID_LABEL1 3
#define ID_LABEL2 4
#define ID_LABEL3 5
#define ID_LABEL4 6
#define ID_EDIT 7
#define VK_T 84

const char *ClsName = "AutoClickApp";
const char *WndName = "AutoClick for MapleStory";
const char *MsgOn = "On";
const char *MsgOff = "Off";

HINSTANCE hInstApp = NULL; // handle to application instance
HINSTANCE m_hInst; // Instance of user32 DLL
DWORD DLLFunc;
//static const FARPROC origPMA =(FARPROC)((DWORD)GetProcAddress(GetModuleHandle("user32.dll"), "PostMessageA")+5);

HWND cHandle; // Windows handle to MapleStory
UINT nIDHotKey; // Hot key identifier
int nTimer1on; // Flag indicating timer1 is on/off
POINT Pos; // Mouse pointer position

HWND hLabel1; // Interval label
HWND hLabel2; // Hot key label
HWND hLabel3; // Status label
HWND hLabel4; // Status on/off
HWND hEdit; // Interval input text box

LRESULT CALLBACK WndProcedure(HWND hWnd, UINT uMsg,
         WPARAM wParam, LPARAM lParam);

INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
MSG Msg;
HWND hWnd;
WNDCLASSEX WndClsEx;

hInstApp = hInstance;

// Create the application window
WndClsEx.cbSize = sizeof(WNDCLASSEX);
WndClsEx.style = CS_HREDRAW | CS_VREDRAW;
WndClsEx.lpfnWndProc = WndProcedure;
WndClsEx.cbClsExtra = 0;
WndClsEx.cbWndExtra = 0;
WndClsEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClsEx.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClsEx.hbrBackground = (HBRUSH)GetStockObject(SYSTEM_FONT);
WndClsEx.lpszMenuName = NULL;
WndClsEx.lpszClassName = ClsName;
WndClsEx.hInstance = hInstance;
WndClsEx.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

// Register the application
if (!RegisterClassEx(&WndClsEx)) {
   MessageBox(0, "Error Registering Class!", "Error!", MB_ICONSTOP | MB_OK);
   return 0;
}

// Create the window object
hWnd = CreateWindow(ClsName, // registered class name
         WndName,          // window name
         WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU, // window style
         CW_USEDEFAULT,    // horizontal position of window
         CW_USEDEFAULT,    // vertical position of window
         325,             // window width
         87,             // window height
         NULL,             // handle to parent or owner window
         NULL,             // menu handle or child identifier
         hInstance,       // handle to application instance
         NULL);          // window-creation data

// Find out if the window was created
// If the window was not created,
// stop the application
if( !hWnd ) {
   MessageBox(0, "Error Creating Window!", "Error!", MB_ICONSTOP | MB_OK);
   return 0;
}

// Display the window to the user
ShowWindow(hWnd, SW_SHOWNORMAL);
UpdateWindow(hWnd);

// Decode and treat the messages
// as long as the application is running
while( GetMessage(&Msg, NULL, 0, 0) )
{
   TranslateMessage(&Msg);
   DispatchMessage(&Msg);
}

return Msg.wParam;

}

__declspec(naked) BOOL WINAPI myPostMessageA(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
__asm
{
   mov edi, edi
   push ebp
   mov ebp, esp
   jmp dword ptr ds:[DLLFunc]

}
}
/*
int myPost (HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
myPostMessageA();

return 0;
}
*/
LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg,
         WPARAM wParam, LPARAM lParam)
{
char buffer[LENGTH];
int interval;
UINT scancode;
LPARAM lparam;

switch(Msg)
{

   case WM_CREATE:

      m_hInst = LoadLibrary("user32.dll");
      DLLFunc = NULL;
      if (m_hInst != NULL) {
         DLLFunc = (DWORD)GetProcAddress(m_hInst, "PostMessageA") + 5;
      }

      // Register "Ctrl + F11" as my hot key
      nIDHotKey = GlobalAddAtom("AutoClick");
      RegisterHotKey(hWnd, nIDHotKey, MOD_CONTROL, VK_F10);

      // Create label
      hLabel1 = CreateWindow("STATIC", "Interval (mSec):", WS_CHILD | WS_VISIBLE,
                           5, 5, 105, 20, hWnd, (HMENU)ID_LABEL1, hInstApp, NULL);

      // Create text box input
      hEdit = CreateWindow("EDIT", "250", WS_CHILD | WS_VISIBLE | WS_BORDER ,
                           110, 5, 70, 20, hWnd, (HMENU)ID_EDIT, hInstApp, NULL);

      // Create label
      hLabel2 = CreateWindow("STATIC", "Hot Key (Ctrl + F10)", WS_CHILD | WS_VISIBLE,
                           185, 5, 128, 20, hWnd, (HMENU)ID_LABEL2, hInstApp, NULL);

      // Create label
      hLabel3 = CreateWindow("STATIC", "Status:", WS_CHILD | WS_VISIBLE,
                           5, 30, 105, 20, hWnd, (HMENU)ID_LABEL3, hInstApp, NULL);

      // Create label
      hLabel4 = CreateWindow("EDIT", "Off", WS_CHILD | WS_VISIBLE | WS_BORDER ,
                           110, 30, 70, 20, hWnd, (HMENU)ID_LABEL4, hInstApp, NULL);

      // Set timer1 flag to off
      nTimer1on = 0;

      // Get window handle on MapleStory
      cHandle = FindWindow("MapleStoryClass", NULL);

      break;

   case WM_HOTKEY:

      if (wParam == nIDHotKey) {

         if (nTimer1on == 0) {

            nTimer1on = 1;

            // Update label status to On
            SendMessage(hLabel4, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)MsgOn);

            // Get interval value from text box input
            SendMessage(hEdit, WM_GETTEXT, LENGTH, (LPARAM)&buffer);
            interval = atoi(buffer);

            // Create timer
            SetTimer(hWnd, ID_TIMER1, interval, NULL);

         } else {

            nTimer1on = 0;

            // Update label status to Off
            SendMessage(hLabel4, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)MsgOff);

            // Destroy timer
            KillTimer(hWnd, ID_TIMER1);
         }
      }
break;

case WM_TIMER:

   if(wParam == ID_TIMER1) {

      if (cHandle == NULL) {
         // Get window handle on MapleStory
         cHandle = FindWindow("MapleStoryClass", NULL);
      }

      if ((cHandle != NULL) && (DLLFunc != NULL)) {

         // 0x54 is virtual key code for 't' in hexidecimal
         // or 84 in decimal
         //scancode = MapVirtualKey(VK_T, 0);
         //scancode = MapVirtualKey(VkKeyScan('t'), 0);

         // Use this scancode to generate Control key down event
         scancode = MapVirtualKey(VK_CONTROL, 0);

         // The scancode value is in the low 16 bits
         // need to shift it to the left 16 bits.
         // + 1 is the number of repetition.
         lparam = (scancode << 16) + 1;

         myPostMessageA(cHandle, WM_KEYDOWN, NULL, lparam);
         //phhPostMessageA(cHandle, WM_KEYDOWN, NULL, lparam);


         // This call will only generate key press t in textboxes
         //phhPostMessageA(cHandle, WM_KEYDOWN, 0x54, NULL);

         // This call will generate key press t in both textboxes
         // and the graphic screen.
         //phhPostMessageA(cHandle, WM_KEYDOWN, 0x54, lparam);

         // Code to generate mouse click events
         //GetCursorPos(&Pos);
         //phhPostMessageA(cHandle, WM_LBUTTONDBLCLK, NULL, (LPARAM)&Pos);
         //phhPostMessageA(cHandle, WM_LBUTTONUP, NULL, (LPARAM)&Pos);
      }
}

break;

   // If the user wants to close the application
   case WM_DESTROY:

      // Un-Register my hot key
      UnregisterHotKey(hWnd, nIDHotKey);

      if (nTimer1on == 1) {
         // Destroy timer1
         KillTimer(hWnd, ID_TIMER1);
      }

      if (m_hInst != NULL) {
         // Un-Load DLL
         ::FreeLibrary(m_hInst);
         m_hInst = NULL;
      }

      // then close it
      PostQuitMessage(WM_QUIT);
      break;

   default:

      // Process the left-over messages
      return DefWindowProc(hWnd, Msg, wParam, lParam);
}

// If something was not done, let it go
return 0;
}

hcavolsdsadgadsg
I'm a spammer

Reputation: 26

Joined: 11 Jun 2007
Posts: 5801

Posted: Wed Apr 09, 2008 11:52 am Post subject:

4ng3licDew wrote:

I coded my program using Microsoft Visual Studio C++ 6, windows XP SP2 32bits, and it works.

You use FindWindowW. I looked it up and it is for Windows 95/98/Me.

W is for wide-character, it's unicode.

4ng3licDew
Cheater

Reputation: 0

Joined: 14 Feb 2008
Posts: 28

Posted: Thu Apr 10, 2008 4:44 am Post subject:

I just created a dll called myHookHop.dll using Microsoft Visual Studio C++ 6

Here is the code for file myHookHop.cpp:

Code:

// myHookHop.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"

HINSTANCE hInst; // Instance of user32 DLL
DWORD DLLFunc;

BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
            )
{
if (ul_reason_for_call == DLL_PROCESS_ATTACH) {

   hInst = LoadLibrary("user32.dll");

   DLLFunc = NULL;
   if (hInst != NULL) {
      DLLFunc = (DWORD)GetProcAddress(hInst, "PostMessageA") + 5;
   }

} else if (ul_reason_for_call == DLL_PROCESS_DETACH) {

   if (hInst != NULL) {
      // Un-Load DLL
      ::FreeLibrary(hInst);
      hInst = NULL;
   }
}

return TRUE;
}

__declspec(naked) BOOL WINAPI myPostMessageA(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
__asm
{
   mov edi, edi
   push ebp
   mov ebp, esp
   jmp dword ptr ds:[DLLFunc]

}
}

Here is code for myHookHop.def:

Code:

LIBRARY myHookHop
DESCRIPTION "PostMessageA bypass"
EXPORTS
myPostMessageA @1

To use myHookHop.dll, here is the modified example code from above:

Code:

#include <windows.h>

#define LENGTH 30
#define ID_TIMER1 2
#define ID_LABEL1 3
#define ID_LABEL2 4
#define ID_LABEL3 5
#define ID_LABEL4 6
#define ID_EDIT 7
#define VK_T 84

const char *ClsName = "AutoClickApp";
const char *WndName = "AutoClick for MapleStory";
const char *MsgOn = "On";
const char *MsgOff = "Off";

// Function pointer type for myPostMessageA in myHookHop DLL
typedef int (__stdcall *HHPtr) (HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);

HINSTANCE hInstApp = NULL; // handle to application instance
HINSTANCE hInstHH; // Instance of hookHop DLL
HHPtr phhPostMessageA; // Function pointer to hhPostMessageA

HWND cHandle; // Windows handle to MapleStory
UINT nIDHotKey; // Hot key identifier
int nTimer1on; // Flag indicating timer1 is on/off
POINT Pos; // Mouse pointer position

HWND hLabel1; // Interval label
HWND hLabel2; // Hot key label
HWND hLabel3; // Status label
HWND hLabel4; // Status on/off
HWND hEdit; // Interval input text box

LRESULT CALLBACK WndProcedure(HWND hWnd, UINT uMsg,
         WPARAM wParam, LPARAM lParam);

INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
MSG Msg;
HWND hWnd;
WNDCLASSEX WndClsEx;

hInstApp = hInstance;

// Create the application window
WndClsEx.cbSize = sizeof(WNDCLASSEX);
WndClsEx.style = CS_HREDRAW | CS_VREDRAW;
WndClsEx.lpfnWndProc = WndProcedure;
WndClsEx.cbClsExtra = 0;
WndClsEx.cbWndExtra = 0;
WndClsEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClsEx.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClsEx.hbrBackground = (HBRUSH)GetStockObject(SYSTEM_FONT);
WndClsEx.lpszMenuName = NULL;
WndClsEx.lpszClassName = ClsName;
WndClsEx.hInstance = hInstance;
WndClsEx.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

// Register the application
if (!RegisterClassEx(&WndClsEx)) {
   MessageBox(0, "Error Registering Class!", "Error!", MB_ICONSTOP | MB_OK);
   return 0;
}

// Create the window object
hWnd = CreateWindow(ClsName, // registered class name
         WndName,          // window name
         WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU, // window style
         CW_USEDEFAULT,    // horizontal position of window
         CW_USEDEFAULT,    // vertical position of window
         325,             // window width
         87,             // window height
         NULL,             // handle to parent or owner window
         NULL,             // menu handle or child identifier
         hInstance,       // handle to application instance
         NULL);          // window-creation data

// Find out if the window was created
// If the window was not created,
// stop the application
if( !hWnd ) {
   MessageBox(0, "Error Creating Window!", "Error!", MB_ICONSTOP | MB_OK);
   return 0;
}

// Display the window to the user
ShowWindow(hWnd, SW_SHOWNORMAL);
UpdateWindow(hWnd);

// Decode and treat the messages
// as long as the application is running
while( GetMessage(&Msg, NULL, 0, 0) )
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}

return Msg.wParam;

}

LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg,
         WPARAM wParam, LPARAM lParam)
{
char buffer[LENGTH];
int interval;
UINT scancode;
LPARAM lparam;

switch(Msg)
{

   case WM_CREATE:

      // Register "Ctrl + F10" as my hot key
      nIDHotKey = GlobalAddAtom("AutoClick");
      RegisterHotKey(hWnd, nIDHotKey, MOD_CONTROL, VK_F10);

      // Create label
      hLabel1 = CreateWindow("STATIC", "Interval (mSec):", WS_CHILD | WS_VISIBLE,
                           5, 5, 105, 20, hWnd, (HMENU)ID_LABEL1, hInstApp, NULL);

      // Create text box input
      hEdit = CreateWindow("EDIT", "250", WS_CHILD | WS_VISIBLE | WS_BORDER ,
                           110, 5, 70, 20, hWnd, (HMENU)ID_EDIT, hInstApp, NULL);

      // Create label
      hLabel2 = CreateWindow("STATIC", "Hot Key (Ctrl + F10)", WS_CHILD | WS_VISIBLE,
                           185, 5, 128, 20, hWnd, (HMENU)ID_LABEL2, hInstApp, NULL);

      // Create label
      hLabel3 = CreateWindow("STATIC", "Status:", WS_CHILD | WS_VISIBLE,
                           5, 30, 105, 20, hWnd, (HMENU)ID_LABEL3, hInstApp, NULL);

      // Create label
      hLabel4 = CreateWindow("EDIT", "Off", WS_CHILD | WS_VISIBLE | WS_BORDER ,
                           110, 30, 70, 20, hWnd, (HMENU)ID_LABEL4, hInstApp, NULL);

      // Set timer1 flag to off
      nTimer1on = 0;

      // Get window handle on MapleStory
      cHandle = FindWindow("MapleStoryClass", NULL);

      // Load hookHop DLL
      hInstHH = LoadLibrary("myHookHop.dll");

      if (hInstHH != NULL) {
         // Get function pointer to hhPostMessageA
         phhPostMessageA = (HHPtr)GetProcAddress(hInstHH, "myPostMessageA");
      }

      break;

   case WM_HOTKEY:

      if (wParam == nIDHotKey) {

         if (nTimer1on == 0) {

            nTimer1on = 1;

            // Update label status to On
            SendMessage(hLabel4, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)MsgOn);

            // Get interval value from text box input
            SendMessage(hEdit, WM_GETTEXT, LENGTH, (LPARAM)&buffer);
            interval = atoi(buffer);

            // Create timer
            SetTimer(hWnd, ID_TIMER1, interval, NULL);

         } else {

            nTimer1on = 0;

            // Update label status to Off
            SendMessage(hLabel4, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)MsgOff);

            // Destroy timer
            KillTimer(hWnd, ID_TIMER1);
         }
      }
break;

case WM_TIMER:

   if(wParam == ID_TIMER1) {

      if (cHandle == NULL) {
         // Get window handle on MapleStory
         cHandle = FindWindow("MapleStoryClass", NULL);
      }

      if ((cHandle != NULL) && (phhPostMessageA != NULL)) {

         // 0x54 is virtual key code for 't' in hexidecimal
         // or 84 in decimal
         //scancode = MapVirtualKey(VK_T, 0);
         scancode = MapVirtualKey(VkKeyScan('t'), 0);

         // Use this scancode to generate Control key down event
         //scancode = MapVirtualKey(VK_CONTROL, 0);

         // The scancode value is in the low 16 bits
         // need to shift it to the left 16 bits.
         // + 1 is the number of repetition.
         lparam = (scancode << 16) + 1;

         phhPostMessageA(cHandle, WM_KEYDOWN, NULL, lparam);

         // This call will only generate key press t in textboxes
         //phhPostMessageA(cHandle, WM_KEYDOWN, 0x54, NULL);

         // This call will generate key press t in both textboxes
         // and the graphic screen.
         //phhPostMessageA(cHandle, WM_KEYDOWN, 0x54, lparam);

         // Code to generate mouse click events
         //GetCursorPos(&Pos);
         //phhPostMessageA(cHandle, WM_LBUTTONDBLCLK, NULL, (LPARAM)&Pos);
         //phhPostMessageA(cHandle, WM_LBUTTONUP, NULL, (LPARAM)&Pos);
      }
}

break;

   // If the user wants to close the application
   case WM_DESTROY:

      // Un-Register my hot key
      UnregisterHotKey(hWnd, nIDHotKey);

      if (hInstHH != NULL) {
         // Un-Load hookHop DLL
         FreeLibrary(hInstHH);
         hInstHH = NULL;
      }

      if (nTimer1on == 1) {
         // Destroy timer1
         KillTimer(hWnd, ID_TIMER1);
      }

      // then close it
      PostQuitMessage(WM_QUIT);
      break;

   default:

      // Process the left-over messages
      return DefWindowProc(hWnd, Msg, wParam, lParam);
}

// If something was not done, let it go
return 0;
}

Attached to this message is the source code for myHookHop.dll and AutoClick.

Snootae
Grandmaster Cheater

Reputation: 0

Joined: 16 Dec 2006
Posts: 969
Location: --->

Posted: Fri Apr 11, 2008 9:00 pm Post subject:

well im not after a dll, or auto-clicker, but thanks

it still doesn't work though, now i've got:

Code:

HWND mswin;
CHAR key;
UINT scancode;
LPARAM lparam;

void sendshit(CHAR key)
{
mswin = FindWindow(L"MapleStoryClass", NULL);
//scancode = MapVirtualKeyW(key, 0);
scancode = MapVirtualKey(VkKeyScan('t'), 0);

lparam = (scancode << 16) + 1;

PMX(mswin, WM_KEYDOWN, 0x54, lparam);;
Sleep(10);
}

void AutoAttack(void) // Auto Attack Thread
{
for(;;) // Main loop
{
sendshit('t');
Sleep(7000);
if (on == 0){
ExitThread(0);
}
}
}

_________________

Fun fun fun, give it a go!

4ng3licDew
Cheater

Reputation: 0

Joined: 14 Feb 2008
Posts: 28

Posted: Sun Apr 13, 2008 4:48 am Post subject:

I just re-read your first post again:

Quote:

and when i try sendshit(0x5A) or (0x11); maplestory dies, anyone know why this would be happening? im stuck

When I wrote my PostMessage + 5 Bypass, these 3 lines gave me problems:

1)

Code:

DWORD dwPM = (DWORD)GetProcAddress( LoadLibrary( _T("user32.dll") ), "PostMessageA" ) + 5;

Code:

_declspec(naked) BOOL WINAPI PMX( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )

Code:

jmp dword ptr ds:[dwPM]

These lines are compiler dependent.

You need to give more information like:
1) The C++ compiler you are using.
2) What program you are trying to write. (From your other thread, I assume that you are writing a DLL and then inject this into MapleStory). My code is just a simple autoclick program.
3) What operation system you are using.

When my autoclick program crashed, I rebuild it in Debug version and then run it again. When it crashes Window XP shows me the error message. I did not understand the terminologies so I googled for for information.

To cut the long story short. I has to debug my autoclick program using the debugger.

Here are some aternative coding to the above 3 lines that I have found using google. They don't work for me:

C++ from cheatengine t=160907

Code:

ULONG reentry_address = GetProcAddress( LoadLibrary("user32.dll"), "PostMessageA" ) + 5;
__declspec(naked) void myPostMessageA(void)
{
__asm
{
mov edi,edi
push ebp
mov ebp,esp
jmp [reentry_address]
}
}

C++ from pastebin(dot)com/m715fb8b9

Code:

DWORD Hooked = (DWORD)GetProcAddress(LoadLibrary("user32.dll"),"PostMessageA")+5;

__declspec(naked) void PMX(
HWND hWnd,
UINT Msg,
WPARAM wParam,
LPARAM lParam)
{
__asm
{
mov edi,edi
push ebp
mov ebp,esp
jmp [Hooked]
}
}

C++ from pastebin(dot)ca/774824

Code:

static const FARPROC origPMA =(FARPROC)((DWORD)GetProcAddress(GetModuleHandle("user32.dll"), "PostMessageA")+5);

_declspec(naked) BOOL WINAPI _postMsg(HWND hWnd, INT Msg, WPARAM wParam, LPARAM lParam)
{
__asm
{
mov edi,edi
push ebp
mov ebp,esp
jmp origPMA
}
}

I hope you get the idea (I only know C/C++ syntax and Object Oriented. I have not use inline assembler language in C++ before). So what I did was alot of try and error.

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