d3d9 steam hook

#define _CRT_SECURE_NO_WARNINGS
#include "scan.hpp"
#include <Windows.h>
#include <future>
#include <iostream>
#include <d3d9.h>


using present_t = HRESULT(__stdcall*)(IDirect3DDevice9Ex* pDevice, RECT* pSourceRect, RECT* pDestRect, HWND hDestWindowOverride, RGNDATA* pDirtyRegion);
present_t oPresent = nullptr;
HRESULT __stdcall hkPresent(IDirect3DDevice9Ex* pDevice, RECT* pSourceRect, RECT* pDestRect, HWND hDestWindowOverride, RGNDATA* pDirtyRegion)
{
    D3DRECT rec{ 10, 10, 55, 100 };

    pDevice->Clear(1, &rec, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 255, 255), 0, 0);


    return oPresent(pDevice, pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion);
}

void init()
{

    Sigscan scan("gameoverlayrenderer.dll");
    uintptr_t* present_V = *(uintptr_t**)scan.scan("FF 15 ? ? ? ? 8B F8 85 DB", 2);
    oPresent = (present_t)*present_V;
    *present_V = (uintptr_t)(&hkPresent);
}


BOOL WINAPI DllMain(void* inst, unsigned long reason, void* reserved)
{
    if (reason == 1) {
        DisableThreadLibraryCalls((HMODULE)inst);
        std::async(std::launch::async, init);
    }
    return 1;
}