GetPngStream

Image* GetPngStream(UINT uiID)
{
    HINSTANCE hInst = AfxGetResourceHandle();
    HRSRC hRsrc = ::FindResource(hInst,MAKEINTRESOURCE(uiID),_T("PNG"));
    if (!hRsrc)
        return NULL;


    // load resource into memory
    DWORD len = SizeofResource(hInst, hRsrc);
    BYTE* lpRsrc = (BYTE*)LoadResource(hInst, hRsrc);
    if (!lpRsrc)
        return NULL;


    // Allocate global memory on which to create stream
    HGLOBAL m_hMem = GlobalAlloc(GMEM_FIXED, len);
    BYTE* pmem = (BYTE*)GlobalLock(m_hMem);
    memcpy(pmem,lpRsrc,len);
    IStream* pstm;
    CreateStreamOnHGlobal(m_hMem,TRUE,&pstm);///找到内存泄漏的地方了 FALSE 就会导致内存泄漏


    // load from stream这是关键一句，通过FromStream返回以各Image*，然后在Graphic的DrawImage地方调用就行了！
    Image* pImg = Gdiplus::Image::FromStream(pstm);


    // free/release stuff
    GlobalUnlock(m_hMem);
    pstm->Release();
    FreeResource(lpRsrc);


    return pImg;
}