How can I create an Image in GDI+ from a Base64-Encoded string in C++?

Question

I have an application, currently written in C#, which can take a Base64-encoded string and turn it into an Image (a TIFF image in this case), and vice versa. In C# this is a

Answer 1

OK, using the info from the Base64 decoder I linked and the example Ben Straub linked, I got it working

using namespace Gdiplus; // Using GDI+

Graphics graphics(hdc); // Get this however you get this

std::string encodedImage = "";

std::string decodedImage = base64_decode(encodedImage); // using the base64 
                                                        // library I linked

DWORD imageSize = decodedImage.length();
HGLOBAL hMem = ::GlobalAlloc(GMEM_MOVEABLE, imageSize);
LPVOID pImage = ::GlobalLock(hMem);
memcpy(pImage, decodedImage.c_str(), imageSize);

IStream* pStream = NULL;
::CreateStreamOnHGlobal(hMem, FALSE, &pStream);

Image image(pStream);

graphics.DrawImage(&image, destRect);

pStream->Release();
GlobalUnlock(hMem);
GlobalFree(hMem);

I'm sure it can be improved considerably, but it works.