Hello,
We use this for our PDF export.
PDFOption MyPdfOption = pfcExport.PDFOption_Create();
MyPdfOption.SetOptionType(PDFOptionType.PDFOPT_LAUNCH_VIEWER);
MyPdfOption.SetOptionValue(pfcArgument.CreateBoolArgValue(false));
Myoptions.append(MyPdfOption);
Hope it helps.
Regards.