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DirectShow / C++ error (not sure which)

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Hi all, just writing up an mp3 class to try to teach myself classes. The code works fine in C but I am getting this error on compilation in a C++ class
D:\Coding\projects\Aurora\Aurora_MP3.cpp(84) : error C2440: ''return'' : cannot convert from ''struct IBaseFilter *'' to ''struct IBaseFilter Aurora_MP3::*''
for the following code peice
IBaseFilter Aurora_MP3::*LoadMP3(LPCWSTR wszFilename)
	IBaseFilter *pSource;

    // Add the new source filter to the graph.
    h = g_pGraphBuilder->AddSourceFilter(wszFilename, wszFilename, &pSource);
	if (FAILED(h))
		return NULL;

	return pSource;
I know what the error is obviously, from the error message, but I''m not sure how to fix it. Is the answer to change the class type from IBaseFilter, to return something else altogether, or am I tiotally off base? Sorry if this is more a C++ question than DirectX, and guess it is since I got dshow working fine with some tute code, but had a 50/50 choice and took the more sensible one

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bah, that was what it was, thank you

Now I just have to go and read some more on C++ to cement in my mind why the pointer goes in front of the class name and not in front of the function like it does in C, rather than just shrugging and doing it that way from now on.

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