I have developed a C# DLL that acts as a series of wrapper classes for certain methods of iTextSharps that is used by Excel VBA. On my dev machine and test machine it works, but when I tried to deploy it on user machines, after running regasm.exe for the C# DLL and tlb, I get the message "Could not load file or assembly iTextSharp.dll"
I have loaded my dll and tlb's onto the user machines and registered them using regasm.
You will need to ship iTextSharps with your wrapper DLL. DLL means dynamic link library so when you reference a DLL from a wrapper DLL, it does just that, reference it, not include it. In C++ you can do static linking, which means that the statically linked library is fully contained in the linking binary.
Also, I believe that you need to use regsvr32 to register it for COM InterOp, and not regasm (that's the global assembly cache for use by managed DLLs and EXEs).
