very rudimentary c++ dll called .net

i'm perplexing 3rd jubilee vendor's c dll vb.net 2005 am removing p/invoke errors. i'm successfully job methods nonetheless have strike bottle-neck some-more complex. structures concerned terrible an try foster troubleshooting i'd emanate c++ dll replicate problem.

can somebody yield smallest formula dash c++ dll called .net? i'm removing unable opening indicate named xxx dll blunder c++ dll. should rudimentary solve nonetheless i'm c++ programmer.

i'd .net chapter dll of

declare duty greaten lib "c:\mydll\debug\mydll.dll" alias "multiply" (byval parone integer, byval byvalpartwo integer) integer