Had the same issue, stumped me for days.

Resolved this by downloading the latest version of the tc-b_new_sdk.dll and more importantly tc-b_new_sdk.lib files. Placed both of these in the service folder and bingo it all works.

I now have a VB.NET service that downloads clock times from 5 Anviz clock machines, then imports the results into our Dynamics NAV ERP and PeopleHR systems.