Loop .mp3 playback

[C++ Programming]

I'm very new to audio. I stumbled across the following code and I'm using the it to play audio .mp3s in my DX9.0 app. ( Nov 08 SDK )

::CoInitialize(NULL);
CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC, IID_IGraphBuilder, (void **)&g_pGraphBuilder);
g_pGraphBuilder->QueryInterface(IID_IMediaControl, (void **)&g_pMediaControl);
g_pGraphBuilder->AddSourceFilter(L"../Media/Audio/Music/Artifact_CharMain.mp3", L"../Media/Audio/Music/Artifact_CharMain.mp3", &pSource);
pSource->FindPin(L"Output", &pPin);
g_pGraphBuilder->Render(pPin);
pPin->Release();
g_pMediaControl->Run();
How can I make the .mp3 loop?

Thanks!