Frequently Asked Question:

Add reference to dll file within Visual Basic 2008

Question

Hello,

I would like to use QuickPdf within a Visual Basic 2008 application, however when I try to add a reference to file QuickPDFAX0718.dll or QuickPDFDLL0718.dll, I get the following error message: "A reference C:...QuickPDFDLL0718.dll could not be added. Please make sure that the file is accessible, and that it is a valid assembly or com component.

What do I need to do, and also which file should I use: QuickPDFAX0718.dll or QuickPDFDLL0718.dll?

Thanks, Reagan

Answer

Both the DLL and ActiveX editions of Quick PDF Library use the .dll file extension, but they're different. Without going into any detail of the pros and cons of each edition, the ActiveX edition must be registered (regsvr32) on the machine where it's used and the DLL edition does not have to be registered, but it must be located at a fixed location on the machine.

It is your decision as to whether you want to use the DLL or ActiveX edition. Both of these editions will work with Visual Basic. Instructions on how to use either edition with Visual Basic can be found at these locations: