// dllmain.cpp : Definiert den Einstiegspunkt für die DLL-Anwendung.
#include "pch.h"
#include <string>

#define HOOK_ADDRESS

std::string text = "Luca ist ein Skripptkiddy";
DWORD dwRenderText = 0x0041A150;
DWORD JumpBack;

void SimpleJMP(BYTE* pAddress, DWORD dwJumpTo, DWORD size) {
	DWORD dwOldProtect, dwOldProtect2;
	VirtualProtect(pAddress, size, PAGE_EXECUTE_READWRITE, &dwOldProtect);
	auto dwRelAddr = (DWORD)(dwJumpTo - (DWORD)pAddress) - 5;
	*pAddress = 0xE9;
	*((DWORD*)(pAddress + 0x1)) = dwRelAddr;
	VirtualProtect(pAddress, size, dwOldProtect, &dwOldProtect2);
}

void RenderText(const char* text, int x, int y) {
	_asm {
		mov eax, 0xFF
		push - 1
		push - 1
		push 0xFF
		push 0xFF
		push y
		push x
		push text
		call dwRenderText
		add esp, 1Ch
		ret
	}
}

__declspec(naked) void Hook() {
	_asm pushad;
	RenderText(text.c_str(), 300, 400);
	_asm
	{
		popad;
		mov eax, 0FFh;
		jmp [JumpBack];
	}
}

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
		JumpBack = 0x0040BA4A + 5;
		SimpleJMP((PBYTE)0x0040BA4A, (DWORD)Hook, 5);
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}