For AutoCrypt, the required CRYPTO-BOX library "fmteos.dll" (resp. fmteos64.dll for 64 bit applications) is generated in the same folder where AutoCrypt has stored your protected application.
For API implementation you need the CRYPTO-BOX library which usually comes with your protected application (e.g. static library for C++ or Delphi, or CBIOS4NET library for C#).
Installation of the CRYPTO-BOX driver, or other network components are not required.