Hallo Richard,
Did you test examples? I think it's example 13 (PDFReportRequiresEE (13))
\Clarion10\accessory\examples\Capesoft\NetTalk\Web Server
In the web world you don't have a (desktop window) as preview :-) A desktop preview window is available only for desktop applications.
For web applications (including NetTalk) all reports will be saved/preview as PDF (and if you wish xlsx, xml, etc...)
If you use SV pdf extension, then you have to see example on NetTalk example folder how to use SV PDF extension in NetTalk app.
You may have 3 options here:
1.Preview PDF on the web page
2.Choose to save/open PDF
3.Save PDF in background
Good luck,
Robert