Modify Email Subject for a report in D365 F&O from x++

public void printReport()

    {

        if (reportContract.parmRdpName() == "ProjInvoiceDP") //Dp classs name

        {

            ProjInvoiceContract contract = reportContract.parmRdpContract() as PSAProjInvoiceContract;         

          

            ProjInvoiceJour       invoiceJournal;

             

            select firstonly * from invoiceJournal where invoiceJournal.RecId == contract.parmProjInvoiceJourRecId();           //Get the which field we need to add in subjcet 

 

            printSettings.emailSubject(strFmt(" %1", invoiceJournal.ProjInvoiceId));

            printSettings.fileFormat(SRSReportFileFormat::PDF);

            printSettings.fileName(strFmt("SAProjInvoiceModern.Report")); //attached file output  

        }

 

        next printReport();

    }