This sample shows how to implement simple exports to custom formats (which is not available in ActiveReports right now). The sample uses third-party library to show export to PDF.
Visual Basic.NET
https://github.com/activereports/Samples18/tree/main/Advanced/PageAndRDLX/CustomPdfExport/VB.NET
C#
https://github.com/activereports/Samples18/tree/main/Advanced/PageAndRDLX/CustomPdfExport/C#
When you run this sample, you see a testing application form, which splits to Windows Forms Viewer and PDF Viewer. You can choose a report and a Pdf export option, click 'Preview as PDF' and view the report in the viewers, and 'Save as PDF' to save the report as Pdf. The sample consists of following projects: