Where can I download interop.pdfcreator.dll?

 Hi guys,

I'd like to print some documents to PDFCreator using ASP.NET and need to reference the dll interop.pdfcreator.dll. Where can I download it ? I can't find it anywhere (pdfforge, sourceforge...).

Also, can someone point me to the documentation for this dll ? The PDF Creator help is very sparse on this subject...

Thanks for your help,