Não encontrei uma opção com o ~ dopdf ~, mas conheço duas ferramentas que podem resolver o seu problema:
PDFCreator enables you to create documents via the command line interface. Here are the different commands that PDFCreator supports.
Example: pdfcreator.exe /PF"C:\help.doc"
- CommandLinePDF:
Print PDF documents from your command line! With a few simple command line options you can fully control your PDF printing from any tool or application.