C++ hile menüsündeki iconları değiştirme nasıl yaparım ?

    Mat imread(const string& filename, int flags=IMREAD_COLOR )
        using namespace cv;
    Mat image = imread("image.jpg");

Mat image = imread("image.png", IMREAD_UNCHANGED);

std::string DownloadBytes(const char* const szUrl)
    {
        HINTERNET hOpen = NULL;
        HINTERNET hFile = NULL;
        char* lpBuffer = NULL;
        DWORD dwBytesRead = 0;
        char* data = 0;
        DWORD dataSize = 0;


        hOpen = InternetOpenA("Majdev&Lov3yp", NULL, NULL, NULL, NULL);
        if (!hOpen) return "";


        hFile = InternetOpenUrlA(hOpen, szUrl, NULL, NULL, INTERNET_FLAG_RELOAD, NULL);


        if (!hFile) {
            InternetCloseHandle(hOpen);
            return "";
        }


        std::string output;
        do {
            char buffer[2000];
            InternetReadFile(hFile, (LPVOID)buffer, _countof(buffer), &dwBytesRead);
            output.append(buffer, dwBytesRead);
        } while (dwBytesRead);


        InternetCloseHandle(hFile);
        InternetCloseHandle(hOpen);


        return output;
    }
}
std::string imData;
std::string resimbaglantısıurl = "";
void downloadImage()
{
    imData = Preview::DownloadBytes(resimbaglantısıurl .c_str());
    D3DXCreateTextureFromFileInMemoryEx(g_D3DDevice9, imData.data(), imData.length(), 50, 31, D3DX_DEFAULT, 0, D3DFMT_UNKNOWN, D3DPOOL_DEFAULT, D3DX_DEFAULT, D3DX_DEFAULT, 0, NULL, NULL, &resmadı);
}