how to do keycode research for dll injection

Understand Keycodes:
Keycodes are numerical representations of keyboard inputs (e.g.,  0x41  for ‘A’). Research virtual keycodes ( VK_* ) via Microsoft’s documentation or WinAPI headers like  winuser.h .

Identify Target Process:
Use tools like Cheat Engine or x64dbg to trace keypress handlers in the target application. Look for  GetAsyncKeyState  or  WM_KEYDOWN  calls in disassembled code.

DLL Injection Setup:

Write a DLL (C/C++) with a  DllMain  entry point.

Hook keycode functions via detours (e.g.,  Detours  library) or inline assembly.

Example hook for  GetAsyncKeyState :
 
HOOK_TRACE_INFO hHook;
DetourAttach(&(PVOID&)OriginalGetAsyncKeyState, HookedGetAsyncKeyState);
 

Keycode Logging:
In your hooked function, log keycodes to a file or network socket:

 
if (vKey == VK_F12) { /* Trigger injection */ }
 

Injection Method:
Use  CreateRemoteThread  or  SetWindowsHookEx  to load your DLL into the target process. Validate with Process Hacker.

Testing:
Test in a sandboxed environment. Monitor for crashes or anti-cheat flags.

Tools: x64dbg, Cheat Engine, Detours.
Ethics: Research only for authorized/educational purposes.