I had been adding print-to-pdf functionality to an existing VB6 app for the past 3-4 weeks. I had originally installed 1.2.3, got the Print to work, based on the demo app at C:\\Program Files\\PDFCreator\\COM\\VB6\\Sample1 (Removed the circle/text printing, added form properties for path, filename, # of copies, etc., load the form, keeping it hidden, executing the initialization stuff, then print to the PDFCreator printer. After printing is complete, unload the form.)
However, I was experiencing the intermittent PDFCreator properties window opening, even though I was autoprinting. I saw that on v1.3.1 there were fixes made for this, SO, on my XP SP3 development box, I...
deleted the 1.2.3 printer
uninstall v1.2.3 PDF Creator
reboot the machine
install v1.3.1 PDF Creator
Install a v1.3.1 printer
Try to run the demo app at C:\\Program Files\\PDFCreator\\COM\\VB6\\Sample1
It won't run: I get an error saying that VB can find the project or library, with the following line highlighted: