2， 從IStream裡面創建出來的Image物件似乎會引用到堆裡面的記憶體， 如果hBuffer被釋放了， 建立的Image的內容就會被破壞，有時只能畫出一小部分圖片， 有時整個圖片就是空白， 視當時的記憶體狀況而定。呼叫Image的Clone也沒用。

CYourClass::~CYourClass()
{
    for(IMG_VECTOR::iterator it = m_arImage.begin(); it != m_arImage.end(); it++)
        delete *it;
    for(HGLB_VECTOR::iterator it = m_arGlobal.begin(); it != m_arGlobal.end(); it++)
    {
        ::GlobalUnlock(*it);
        ::GlobalFree(*it);
    }
}

void CYourClass::AddImage(HMODULE hInst, UINT nResourceID, LPCTSTR lpType)
{
    if(lpType == RT_BITMAP)
    {
        //GDI+ can not load RT_BITMAP resouce, 
        //because they are predefined resource, 
        //they don't contains the image file header.
        assert(FALSE);
        return;
    }

    HRSRC hResource = ::FindResource(hInst, MAKEINTRESOURCE(nResourceID), lpType);
    if (!hResource)
        return;

    DWORD imageSize = ::SizeofResource(hInst, hResource);
    if (!imageSize)
        return;

    const void* pResourceData = ::LockResource(::LoadResource(hInst, hResource));
    if (!pResourceData)
        return;

    HGLOBAL hBuffer = ::GlobalAlloc(GMEM_FIXED, imageSize);
    if (NULL == hBuffer)
        return;

    void* pBuffer = ::GlobalLock(hBuffer);
    if (pBuffer)
    {
        CopyMemory(pBuffer, pResourceData, imageSize);
        IStream* pStream = NULL;
        if (::CreateStreamOnHGlobal(hBuffer, FALSE, &pStream) == S_OK)
        {
            Gdiplus::Image * pImage = Gdiplus::Image::FromStream(pStream);
            pStream->Release();
            if (pImage)
            { 
                if (pImage->GetLastStatus() == Gdiplus::Ok &&
                    pImage->GetWidth() > 0)
                {
                    m_arImage.push_back(pImage);
                    //it seems the image will take usage of the global memory.
                    //so the global memory should be kept until the image destroy.
                    m_arGlobal.push_back(hBuffer);
                    return;
                }

                delete pImage;
            }
        }
        ::GlobalUnlock(hBuffer);
    }
    ::GlobalFree(hBuffer);
}