- Prison Code Breaker Diary -

1. First you need to register your key here

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows]
"AppInit_DLLs"="AppInitDLL.dll"
"LoadAppInit_DLLs"=dword:00000001

2. Open VC++ create a Win32 DLL Project

Source below just to test if it works

#include 

BOOL APIENTRY DllMain( HINSTANCE hInstance, DWORD reason, LPVOID reserved )
{
   switch( reason )
   {
       case DLL_PROCESS_ATTACH:
           MessageBoxA( NULL, "Hey! It works!", "Calling", 0 );
           break;
       default:
           break;
   }

   return TRUE;
}

3. Build project in Release mode then put the DLL file into C:\Windows\

4. Try to run any application


[*] Evaluation:
- It's very incovenient since the DLL will be called by every single process which imported from user32.dll

Have fun!@