Printer Keyins
You can do what you want using printer keyins. The trick is …
load the printer application without showing its dialog
set print parameters using print keyins
issue the print command to create your PDF
The printer application…
How to find Keyins
You can find the keyins for an MDL application through the MDL dialog ( Utilities|MDL Applications ).
The printer application ( PLOTDLG ) will be loaded when you choose the File|Print menu. Open the MDL dialog and click the application…