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how to hooking d3dx library and change font and size

Discussion on how to hooking d3dx library and change font and size within the 12Sky2 forum part of the MMORPGs category.

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how to hooking d3dx library and change font and size

Hello, when I examined the exe I used with ida, the font was created with the "d3dxcreatefontindirecta" function. I tried to hook this function with the minhook library, but the client gave an error. I think my mistake is in calling the function.


My code;
Code:
// Hooks.h
#pragma once

#include "Core.h"
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <d3dx9.h>
#include "MinHook.h"
#pragma comment(lib, "d3dx9.lib")
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "kernel32.lib")

// Connect
typedef int (WINAPI* CONNECT)(SOCKET, const struct sockaddr*, int);
extern CONNECT oConnect;
int WINAPI HookedConnect(SOCKET s, const struct sockaddr* name, int namelen);

// CreateFileA
bool IsAllowedDirectory(const std::string& dir);
std::tuple<std::string, std::string, std::string>SplitPath(const std::string& filePath);
typedef HANDLE(WINAPI* tCreateFileA)(LPCSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode,
    LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition,
    DWORD dwFlagsAndAttributes, HANDLE hTemplateFile);
extern tCreateFileA oCreateFileA;
HANDLE WINAPI HookedCreateFileA(LPCSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode,
    LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition,
    DWORD dwFlagsAndAttributes, HANDLE hTemplateFile);

// Font
typedef int(__thiscall* tFont)(char*);
extern tFont oFont;
BOOL hookedFont(char *thisPtr);

typedef HRESULT(WINAPI* tD3DXCreateFontIndirectA)(LPDIRECT3DDEVICE9, CONST D3DXFONT_DESCA*, LPD3DXFONT*);
extern tD3DXCreateFontIndirectA oD3DXCreateFontIndirectA;
HRESULT WINAPI HookedD3DXCreateFontIndirectA(LPDIRECT3DDEVICE9 pDevice, CONST D3DXFONT_DESCA* pDesc, LPD3DXFONT* ppFont);

// Declare the function to install and uninstall the hook
DWORD InstallHook();
DWORD UninstallHook();


// Hooks.cpp
#include "Hooks.h"

DWORD InstallHook()
{
    // Initialize MinHook
    if (MH_Initialize() != MH_OK) {
        // Handle initialization error
        return 1;
    }

    // Create a hook for the connect function
    if (MH_CreateHookApi(L"ws2_32.dll", "connect", &HookedConnect, reinterpret_cast<LPVOID*>(&oConnect)) != MH_OK) {
        // Handle hook creation error
        return 1;
    }

    // Create a hook for the CreateFileA function
    if (MH_CreateHookApi(L"kernel32.dll", "CreateFileA", &HookedCreateFileA, reinterpret_cast<LPVOID*>(&oCreateFileA)) != MH_OK) {
        // Handle hook creation error
        return 1;
    }

    // Create a hook for the Font function
    oFont = reinterpret_cast<tFont>(0x004BDF60); // Replace with the actual address
    if (MH_CreateHook(reinterpret_cast<void*>(oFont), &hookedFont, reinterpret_cast<void**>(&oFont)) != MH_OK) {
        // Handle hook creation error
        return 1;
    }

    if (MH_CreateHookApi(L"D3DX9_42.dll", "D3DXCreateFontIndirectA", &HookedD3DXCreateFontIndirectA, reinterpret_cast<LPVOID*>(&oD3DXCreateFontIndirectA)) != MH_OK) {
        // Handle hook creation error
        MessageBoxA(NULL, "MinHook Error", "MinHook Error", MB_OK);
        return 1;
    }


    // Enable the hook
    if (MH_EnableHook(MH_ALL_HOOKS) != MH_OK) {
        // Handle hook enable error
        return 1;
    }

    return 0;
}

DWORD UninstallHook()
{
    // Disable the hook
    if (MH_DisableHook(MH_ALL_HOOKS) != MH_OK) {
        // Handle hook disable error
        return 1;
    }

    // Uninitialize MinHook
    if (MH_Uninitialize() != MH_OK) {
        // Handle uninitialization error
        return 2;
    }

    return 0;
}

// CreateFileA.cpp
#include "Hooks.h"
#include <Shlwapi.h>

tFont oFont = nullptr;

BOOL hookedFont(char *thisPtr)
{
    std::string fontPath = "G01_GFONT\\gigassoft_12.ttf";

    if (!PathFileExistsA(fontPath.c_str())) {
        return 0;
    }
    else {
        if (!AddFontResourceA(fontPath.c_str())) {
            return 0;
        }
        else {
            return 1;
        }
    }
   
}

tD3DXCreateFontIndirectA oD3DXCreateFontIndirectA = nullptr;
HRESULT WINAPI HookedD3DXCreateFontIndirectA(LPDIRECT3DDEVICE9 pDevice, CONST D3DXFONT_DESCA* pDesc, LPD3DXFONT* ppFont) {

    // Yeni font parametreleri
    D3DXFONT_DESCA newFontDesc;
    ZeroMemory(&newFontDesc, sizeof(newFontDesc));
    newFontDesc.Height = 48;  // Punto boyutu
    newFontDesc.Width = 0;
    newFontDesc.Weight = FW_NORMAL;
    newFontDesc.MipLevels = 1;
    newFontDesc.Italic = FALSE;
    newFontDesc.CharSet = DEFAULT_CHARSET;
    newFontDesc.OutputPrecision = OUT_DEFAULT_PRECIS;
    newFontDesc.Quality = DEFAULT_QUALITY;
    newFontDesc.PitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
    strcpy_s(newFontDesc.FaceName, "Arial");  // Font adı

    HRESULT result = oD3DXCreateFontIndirectA(pDevice, &newFontDesc, ppFont);

    if (result >= 0)
    {
        MessageBoxA(NULL, "test", "test", NULL);
    }

    return result;
}
Thanks in advance for your help...
@ @ @ @ @ @
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