It is used for getting the current footer information
Example code
CComPtr<ISmpReport>m_SmpReport;
HRESULT hr=SmpReport.CoCreateInstance(CLSID_SmpReport);
BSTR bstrFooter1,bstrFooter2,bstrFooter3;
m_SmpReport->GetFooterInfo(&bstrFooter1,&bstrFooter2,&bstrFooter3);