How to create delegate stream

Hi, Iam using VS2015 Winforms, VC++. C++/CLI With my application I try to print the rdlc report. And I get the below error.

can't take address of 'PrintRDLCReport::CreateStream' unless creating delegate instance.

Code:

---

private: static Stream^ stream = gcnew MemoryStream();
               
        public: static Stream^ CreateStream(String^ name, String^ fileNameExtension, Encoding^ encoding, String^ mimeType, bool willSeek){
                //Stream^ stream = gcnew MemoryStream();
                stream = gcnew MemoryStream();
                //stream = gcnew FileStream(name + "." + fileNameExtension,FileMode::Create);
                m_streams->Add(stream);
                return stream;
        }
        public: static System::Void Export(LocalReport^ report, bool print){
                PaperSize^ paperSize = m_pageSettings->PaperSize;
                Margins^ margins = m_pageSettings->Margins;
                print = true;
               
                String^ deviceInfo = String::Format(CultureInfo::InvariantCulture,
                        "<DeviceInfo>" +
                        "<OutputFormat>EMF</OutputFormat>" +
                        "<PageWidth>{5}</PageWidth>" +
                        "<PageHeight>{4}</PageHeight>" +
                        "<MarginTop>{0}</MarginTop>" +
                        "<MarginLeft>{1}</MarginLeft>" +
                        "<MarginRight>{2}</MarginRight>" +
                        "<MarginBottom>{3}</MarginBottom>" +
                        "</DeviceInfo>",
                        ToInches(margins->Top),
                        ToInches(margins->Left),
                        ToInches(margins->Right),
                        ToInches(margins->Bottom),
                        ToInches(paperSize->Height),
                        ToInches(paperSize->Width));

                cli::array<Warning^>^ warnings;
                m_streams = gcnew List<Stream^>();
               

report->Render("Image", deviceInfo, CreateStream, warnings); ?????????????????????????

This above line CreateStream generates the error
can't take address of 'PrintRDLCReport::CreateStream' unless creating delegate instance       
 

                for each(Stream^ stream in m_streams) {
                        stream->Position = 0;
                }
                if (print==true){
                        Print();
                }
        }

---

Thanks for the kind advice, Thanks again !