Hello Frank,
We use com interface to dirve pdfcreator in our application, and we have a crash with the pdf monitor. This crash is reproduicible with your c# sample.
Here is the scenario, i can send you sample code if you want (pdfcreator 1.1 windows 7).
Launch the application that use com interface
Open pdfcreator monitor
Switch to the applciation, and print something
now close the printmonitor with quit menu or window close box
Switch to the applciation, and print something
Pdf monitor crash
In order to test compatibility with or app, i'll be glad to try the version 1.2
Best regards
Patrick