HWND hwnd = FindWindow("LWJGL", "Minecraft 1.8.9");
DWORD process_id;
GetWindowThreadProcessId(hwnd, &process_id);

HANDLE process_handle = OpenProcess(PROCESS_ALL_ACCESS, false, process_id);

char dll[MAX_PATH];
GetFullPathNameA(DLL_DIRECTORY_HERE, MAX_PATH, dll, NULL);

LPVOID memory = VirtualAllocEx(process_handle, 0, sizeof(dll), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

WriteProcessMemory(process_handle, memory, dll, sizeof(dll), 0);

CreateRemoteThread(Process, NULL, NULL, (LPTHREAD_START_ROUTINE)LoadLibrary, (LPVOID)Memory, NULL, NULL);

LoadLibrary = (LPVOID)GetProcAddress(GetModuleHandle("example.dll"), "LoadLibraryA");