Take a look at http://fox.wikis.com/wc.dll?Wiki~UsingAmyuniPDFConverterWithVFP~VFP. The code is for Amyuni 2.5x (not the newest 3.0) but it does show how to call EnablePrinter, which may be what you're asking about.

>Hi,
>
>We used to use an older version of the PDF Convertor, but have had to upgrade for compatibility with Vista.
>
>With the old version, our install routine created a printer in Windows. In VFP, it was then a simple matter to select the printer and print a report to it to create a pdf file.
>
>With the latest version of the PDF Convertor, I believe that you have to activate the printer before you can print to it (and the printer remains activated for 20 seconds).
>
>Does anyone have sample code to do this in VFP 9.0? Can the printer still be created outside of your application and then activated before each use?
>
>Regards.
>
>Matt.