let me explain a little:
The PDFCreator and the PDFArchitect are two different programs (the PDFArchitect gets installed together with PDFCreator by default)
The PDFCreator works as a virtual printer, you can create a PDF from any application that can print, without any further activation. This is done in the same way as printing to a phisical printer, with the only difference beeing you select the PDFCreator printer instead.
The office button is part of PDFArchitect which you can best learn about by starting the PDFArchitect.exe, nearly everything about it is explained there.