Powerbuilder webservice, print a datawindow

Hi

I want to print out a datawindow from my Powerbuilder (12.6.0.4081) webservice.

It this possible?

I tried the functions Print, PrintGetPrinter, PrintGetPrinters..., but it returns null.

So I have the feeling that (print datawindows) is not supported in powerbuilder webservices?

Thx

Andy