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Bitmap::FromFile returning NULL on x86
HRESULT hr;
    using namespace Gdiplus;
    std::string decodedImage = Base64EncodedImage;
    DWORD imageSize = decodedImage.length();

    HGLOBAL hMem = ::GlobalAlloc(GMEM_MOVEABLE, imageSize);
    if (!hMem)
        ErrorExit(TEXT("GlobalAlloc")); //http://msdn.microsoft.com/en-us/library/windows/desktop/ms682499(v=vs.85).aspx

    LPVOID pImage = ::GlobalLock(hMem);
    if (!pImage)
        ErrorExit(TEXT("GlobalLock"));

    CopyMemory(pImage, decodedImage.c_str(), imageSize);
    IStream* pStream = NULL;

    BitmapData* bitmapData = new BitmapData;
    if (::CreateStreamOnHGlobal(hMem, FALSE, &pStream) != S_OK)
        ErrorExit(TEXT("CreateStreamOnHGlobal"));
    else
    {
        bitmap = Bitmap::FromStream(pStream);   //FAILS on WIN32
        if (!bitmap)
            ErrorExit(TEXT("FromStream"));

        RECT clientRect;
        GetClientRect(hwnd, &clientRect);

        bitmapClone = bitmap->Clone(0, 0, clientRect.right, clientRect.bottom, PixelFormatDontCare);
        delete bitmap;
        bitmap = NULL;
    }

bitmap = Bitmap::FromStream(pStream);

GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR           gdiplusToken;
// Initialize GDI+.
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

GdiplusShutdown(gdiplusToken);