Creating an HICON from a byte array in C++?

问题:

I have a PNG-encoded icon as a byte array in memory. What is the recommended way of creating an HICON object from this byte array?

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Imaginary bonus points if you know a solution without ATL or GDI+... :)

回答1:

HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, dataSize);
LPVOID pImage = GlobalLock(hMem);
memcpy(pImage, pngData, dataSize);
GlobalUnlock(hMem);

ATL::CComPtr<IStream> pStream;
CreateStreamOnHGlobal(hMem, TRUE, &pStream);

Gdiplus::Bitmap *pBitmap = new Gdiplus::Bitmap(pStream);
HICON YOUR_HICON = pBitmap->GetHICON();

回答2:

It looks like you could do this with CreateBitmap and CreateIconIndirect, or maybe even just CreateIcon. Don't ask me for code because I'm not really familiar with this low-level graphics stuff.