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Module Handle Problem

 
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Skygen
How do I cheat?
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Joined: 10 Mar 2013
Posts: 2

PostPosted: Sun Mar 31, 2013 3:53 pm    Post subject: Module Handle Problem Reply with quote

Code:


HMODULE GetModuleHandleExtern( char *szModuleName, DWORD dwProcessId )
{
   if( !szModuleName || !dwProcessId ) { return NULL; } // invalid input
   HANDLE hSnap = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, dwProcessId );
   if( hSnap == INVALID_HANDLE_VALUE ) { return NULL; }
   MODULEENTRY32 me;
   me.dwSize = sizeof( MODULEENTRY32 );
   if( Module32First( hSnap, &me ) ) // we go now
   {
      while( Module32Next( hSnap, &me ) ) // through all modules in the target process
      {
         if( !strcmp( me.szModule, szModuleName ) ) // is this the model we are looking for?
         {
            CloseHandle( hSnap );
            return me.hModule; // this is our module, return it.
         }
      }
   }
   CloseHandle( hSnap );
   return NULL; // counldn't find module
}

DWORD D2Client = (DWORD)GetModuleHandleExtern("Game.dll", ProcessId);


DWORD d, ds;
VirtualProtect((void*)(D2Client+0x465257), 3, PAGE_EXECUTE_READWRITE, &d);
//unsigned char newValue = 0xE9;
BYTE bytesJump1 = 0xE9;
WriteProcessMemory(h1, (void*)(D2Client+0x465257), (void*)&bytesJump1, 3, NULL);
VirtualProtect((void*)(D2Client+0x465257),3,d,&ds);


My code can find Module Handle only if game has it (.dll). Why?
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TsTg
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PostPosted: Sun Mar 31, 2013 6:06 pm    Post subject: Reply with quote

Because TH32CS_SNAPMODULE is assigned to the CreateToolhelp32Snapshot function, you can use TH32CS_SNAPALL instead, this one snaps all processes, threads and dlls, the first snaps only link libraries.(if you specify a process id value, that process is the only one included in the snap, otherwise it will include all processes)

and if you want to find a process and not a library loaded into it, replace Module32Next and Module32First, with Process32Next and Process32First.

also replace MODULEENTRY32 structure with PROCESSENTRY32, also set dwProcessId value to zero.

you can read about the tool help usage with all other functions and structures here:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms686832
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atom0s
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PostPosted: Mon Apr 01, 2013 7:13 am    Post subject: Reply with quote

The game has to have the DLL loaded in it in order for it to be found.
There is nothing wrong with what the code is doing, that is just how it works.

If the module isn't loaded, the API has nothing to find, it can't assume what Game.dll you are referring to.

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