For regfree deployment, one needs to place the following 4 RC5-BaseDlls within this \Bin\ Folder:
- vbRichClient5.dll
- vb_cairo_sqlite.dll
- DirectCOM.dll
- vbWidgets.dll

As well as the:
- pdfium.dll (in a recent 32Bit __stdcall version), downloadable e.g. from:
  https://github.com/pvginkel/PdfiumBuild/tree/master/Builds

If you deploy regfree, no Setup is needed on the target-machine -
your "PortableApp.zip" should later only contain:
\MyApp\
   MyCompiledApp.exe
   \Bin\  (containing the above mentioned Dlls)
   \Res\  (containing the Image-resources)

For Debugging in VB6-IDE-Mode:
- the pdfium.dll is a requirement within the \Bin\ Folder as well
- whereas the above mentioned 4 RC5-Dlls are not needed (yet) in \Bin\

Instead, when you run the VB6-Project in the IDE, the above 4 RC5-Dlls will  
be used from the place, where you registered them on your dev-machine...
(concretely: 
 vbRichClient5.dll and vbWidgets.dll are the two COM-Dlls of the package,
 which need to be registered per \SysWow64\regsvr32, before you can run the Project in the IDE
 On dev-machines this "registered root-version" of the 4 RC5-BaseDlls are usually placed in C:\RC5\...
)

Please ensure, that you download (and re-register) a recent set of the RC5-libs via:
http://www.vbrichclient.com/Downloads/vbRC5BaseDlls.zip
...since the Demo makes use of SQLites ZipExtension, 
   which is contained only in recent versions of the vb_cairo_sqlite.dll

Have fun!

Olaf Schmidt, August 2019
