the manual way to print with Micrsoft print to pdf in win10 is :
-choose the MS printer as default (printers panel)
-Invok any verb "print"
-fires a dialog box then confirm default printer (MS one)
-preview document (adjust) and click print.
-fires a dialog box to choose a filename(path)
-render the pdf.

How to programmatically print ( any printable file) to PDF file without prompting (silently)
for filename from vfp using the Microsoft Print To PDF printer that comes with Windows 10 .