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[C++] Error: Entry point must be defined

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Innovation
Grandmaster Cheater

Reputation: 12

Joined: 14 Aug 2008
Posts: 617

Posted: Sun Nov 30, 2008 9:30 am Post subject: [C++] Error: Entry point must be defined

This is my source:

Code:

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

bool Unlimited_Attack_Switch = false;
bool Auto_Skill_Switch = false;

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

DWORD dwAddress = 0x00400000;
DWORD dwLen = 0x7FFFFFFF;

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

__inline ULONG_PTR ReadPointer(ULONG_PTR* ulBase, INT nOffset){
if ( !IsBadReadPtr((VOID*)ulBase, sizeof(ULONG_PTR)) )
if ( !IsBadReadPtr((VOID*)((*(ULONG_PTR*)ulBase)+nOffset), sizeof(ULONG_PTR)) )
return *(ULONG_PTR*)((*(ULONG_PTR*)ulBase)+nOffset);
return 0;
}

bool comp(const BYTE* pData, const BYTE* bMask, const char* szMask)
{
for(;*szMask;++szMask,++pData,++bMask)
if(*szMask=='x' && *pData!=*bMask )
return false;
return (*szMask) == NULL;
}

DWORD dwFindPattern(DWORD dwAddress, DWORD dwLen, BYTE *bMask, char* szMask, DWORD dwOffset)
{
for(DWORD i=0; i < dwLen; i++)
if( comp( (BYTE*)( dwAddress+i ),bMask,szMask) )
return (DWORD)(dwAddress+i+dwOffset);

return 0;
}

void Unlimited_Attack()
{
char Unlimited_Attack_Bytes[17] = "\x8B\x0D\x00\x00\x00\x00\x8B\x01\xFF\x50\x00\x8B\xC8\xE8\x00\x00";
char Unlimited_Attack_Offset_Bytes[26] = "\x8B\x8B\x00\x00\x00\x00\x83\xF9\x00\x8D\x83\x00\x00\x00\x00\x0F\x00\x00\x00\x00\x00\x41\x89\x08\x68";
DWORD Unlimited_Attack_Address = *(DWORD*)dwFindPattern(dwAddress, dwLen, (BYTE*)Unlimited_Attack_Bytes, "xx????xxxx?xxx??", 2);
DWORD Unlimited_Attack_Offset_Address = *(DWORD*)dwFindPattern(dwAddress, dwLen, (BYTE*)Unlimited_Attack_Offset_Bytes, "xx????xx?xx????x?????xxxx", 2);

// GMS v62
// DWORD Item_P_Address = 0x00978358;
// DWORD Item_Base_Offset_Address = 0xD58;
char Item_P_Bytes[17] = "\xA1\x00\x00\x00\x00\x3B\xC7\x74\x00\x8B\xC8\x83\xC0\x00\xF7\xD9"; // A1 ? ? ? ? 3B C7 74 ? 8B C8 83 C0 ? F7 D9
char Item_Base_Offset_Bytes[17] = "\x89\x8F\x00\x00\x00\x00\x8B\x48\x00\x6A\x00\x89\x8F\x00\x00\x00"; // 89 8F ? ? ? ? 8B 48 ? 6A ? 89 8F ? ? ?
DWORD Item_P_Address = *(DWORD*)dwFindPattern(dwAddress, dwLen, (BYTE*)Item_P_Bytes, "x????xxx?xxxx?xx", 0);
DWORD Item_Base_Offset_Address = *(DWORD*)dwFindPattern(dwAddress, dwLen, (BYTE*)Item_Base_Offset_Bytes, "xx????xx?x?xx???", 0);

char Character_Bytes[17] = "\x8B\x0D\x00\x00\x00\x00\x50\x57\x8D\x45\x00\x50\x53\xE8\x00\x00";
char Character_X_Bytes[17] = "\x8B\x86\x00\x00\x00\x00\x3B\xC3\x89\x5D\x00\x00\x00\x8B\x08\x8D";
DWORD Character_Address = *(DWORD*)dwFindPattern(dwAddress, dwLen, (BYTE*)Character_Bytes, "xx????xxxx?xxx??", 2);
DWORD Character_X_Address = *(DWORD*)dwFindPattern(dwAddress, dwLen, (BYTE*)Character_X_Bytes, "xx????xxxx???xxx", 2);

int Old_X_Position = 0;

for(;;Sleep(10))
{
   if (Unlimited_Attack_Switch == true)
   {
      if (ReadPointer((ULONG_PTR*)Unlimited_Attack_Address, Unlimited_Attack_Offset_Address) >= 99)
      {
         Old_X_Position = ReadPointer((ULONG_PTR*)Character_Address, Character_X_Address);
         while (ReadPointer((ULONG_PTR*)Unlimited_Attack_Address, Unlimited_Attack_Offset_Address) >= 99)
         {
            *(DWORD*)(*(DWORD*)Item_P_Address + Item_Base_Offset_Address) = Old_X_Position - 15;
            Sleep(1);
         }
      }
      Sleep (100);
   }
}
}

void Auto_Skill()
{
for(;;Sleep(10))
{
   if (Auto_Skill_Switch == true)
   {
      HWND hMSWindow = FindWindow("MapleStoryClass", 0);
      if (hMSWindow != NULL)
      {
         Sleep(40000);
         // _PostMessageA(hMSWindow, WM_KEYDOWN, 0x56, (MapVirtualKey(0x56, 0) << 16));
         _PostMessageA(hMSWindow, WM_KEYDOWN, 0x56, NULL);
         Sleep(3000);
         _PostMessageA(hMSWindow, WM_KEYUP, 0x56, NULL);
      }
      Sleep(10);
   }
}
}

void MainThread()
{
for(;;Sleep(10))
{
   if (GetAsyncKeyState(VK_F11))
   {
      if (Unlimited_Attack_Switch == false)
      {
         Unlimited_Attack_Switch = true;
         Sleep(500);
      }
      else
      {
         Unlimited_Attack_Switch = false;
         Sleep(500);
      }
   }
   if (GetAsyncKeyState(VK_F12))
   {
      if (Auto_Skill_Switch == false)
      {
         Auto_Skill_Switch = true;
         Sleep(500);
      }
      else
      {
         Auto_Skill_Switch = false;
         Sleep(500);
      }
   }
}
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
switch (ul_reason_for_call)
{
   case DLL_PROCESS_ATTACH:
      DisableThreadLibraryCalls(hModule);
      CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)MainThread, hModule, 0, NULL);
      CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)Unlimited_Attack, hModule, 0, NULL);
      CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)Auto_Skill, hModule, 0, NULL);
      break;
   case DLL_PROCESS_DETACH:
      break;
}
return TRUE;
}

This is the error I get:

Code:

LINK : fatal error LNK1561: entry point must be defined

Does anyone know what is wrong?

Edit: I see what I did wrong.

Last edited by Innovation on Sun Nov 30, 2008 9:59 am; edited 4 times in total

Symbol
I'm a spammer

Reputation: 0

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

Posted: Sun Nov 30, 2008 9:35 am Post subject:

Go to project settings and in General change the Configuration Type to Dynamic-Link Library. (.dll) If it's already a DLL, then check your settings in Linker -> Advanced. Umm, let me guess... you only learn C++ to make MapleStory bots...

Zerith
Master Cheater

Reputation: 1

Joined: 07 Oct 2007
Posts: 468

Posted: Sun Nov 30, 2008 9:41 am Post subject:

Also, you defined WIN32_LEAN_AND_MEAN after including windows.h...first learn why people use it. (I'm not copying you Symbol ._.)

Innovation
Grandmaster Cheater

Reputation: 12

Joined: 14 Aug 2008
Posts: 617

Posted: Sun Nov 30, 2008 9:52 am Post subject:

Symbol wrote:

Go to project settings and in General change the Configuration Type to Dynamic-Link Library. (.dll)

If it's already a DLL, then check your settings in Linker -> Advanced.

Umm, let me guess... you only learn C++ to make MapleStory bots... Rolling Eyes

Thanks! It was set to create an executable. LOL. I am not really good at exploring compiler settings. Yes, I did learn C++ to make hacking tools. I learned Delphi for other reasons though also.

Zerith wrote:

Also, you defined WIN32_LEAN_AND_MEAN after including windows.h...first learn why people use it.

(I'm not copying you Symbol ._.)

I know it is used to get rid of rarely used things from the windows header. I'll just take it out.

Last edited by Innovation on Sun Nov 30, 2008 9:54 am; edited 1 time in total

Zerith
Master Cheater

Reputation: 1

Joined: 07 Oct 2007
Posts: 468

Posted: Sun Nov 30, 2008 9:53 am Post subject:

inoobzx wrote:

Symbol wrote:

Thanks! It was set to create an executable. LOL. I am not really good at exploring compiler settings. Yes, I did learn C++ to make hacking tools. I learned Delphi for other reasons though also.

Zerith wrote:

Also, you defined WIN32_LEAN_AND_MEAN after including windows.h...first learn why people use it.

(I'm not copying you Symbol ._.)

I know it is used to get rid of rarely used things. I'll just take it out. -.-

No..,just define it before including windows.h, look in windows.h and you will see why.

Innovation
Grandmaster Cheater

Reputation: 12

Joined: 14 Aug 2008
Posts: 617

Posted: Sun Nov 30, 2008 9:58 am Post subject:

Zerith wrote:

inoobzx wrote:

Symbol wrote:

Thanks! It was set to create an executable. LOL. I am not really good at exploring compiler settings. Yes, I did learn C++ to make hacking tools. I learned Delphi for other reasons though also.

Zerith wrote:

Also, you defined WIN32_LEAN_AND_MEAN after including windows.h...first learn why people use it.

(I'm not copying you Symbol ._.)

I know it is used to get rid of rarely used things. I'll just take it out. -.-

No..,just define it before including windows.h, look in windows.h and you will see why.

I see your point.

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