Print Adobe PDF using VBA without created PDF opening

I am using VBA in Outlook 2016 Windows to print the current Email Message using Adobe PDF to a create a PDF document. The PDF automatically opens after being created.  I want to avoid the opening of the PDF. When creating the PDF manually, I can prevent the document from opening by un-selecting "View Adobe PDF results".  From Adobe web site, https://www.adobe.com/devnet-docs/acrobatetk/tools/Wizard/WizardDC/pdfprinter.html it describes setting the SOFTWARE\Adobe\Acrobat Distiller\DC\ViewPrintOutput key to 0 to suppress opening the PDF after creating.  I make the change, but the PDF continues to open.  I have tried making the change both under HKLM and HKCU.  Appreciate if anyone could help figure out how to avoid PDF document from opening.