Combining several pdfs or pdfs and word docs

1) Does anyone know how to combine several pdfs together into one pdf file, using C# preferably?

2) Does anyone know how to combine pdfs and Word docs into one pdf file, using C# preferably?

 

I've gotten fairly close using

_PDFCreator.cPrintFile("file1.pdf");

_PDFCreator.cPrintFile("file2.pdf");

 

But then it just stays waiting in offline mode.  I think I need to use the cCombineAll() method, but I'm not sure where.

 

I just got an error:

---------------------------------------------------------------------
PDFCreator - www.pdfforge.org
----------------------------------------------------------------------
Errorprotocol
----------------------------------------------------------------------
PDFCreator 0.9.9 - Error message
----------------------------------------------------------------------
ERROR DESCRIPTION:
          Error-Nr: 53 (File not found)
          Modul: modGeneral2
          Procedure: CombineFiles
          Line:      50150
          Date/Time: 01-26-2010 / 10:04:55
----------------------------------------------------------------------
CALLSTACK:
----------------------------------------------------------------------
SYSTEMINFO:
 Windows XP 5.1 Build 2600 (Service Pack 3)
  [TerminalServer WinXP WinXPProEdition IsWinXPPlus IsWinXPProEdition]
----------------------------------------------------------------------
 

And I get the dialog box message:

"The file can not be found!

C:\\Documents and Settings\\adickson\\Local Settings\\Temp\\PDFCreator\\PDFCreatorSpool\\~PSBE.tmp"

 

What does this mean?  I was trying to combine 2 Word documents into one pdf.