Win/CE Std Serial Comm Lib for eVB 

The Windows/CE Standard Serial Communications Library for eVB (WSC4eVB) is a serial port communication library for Embedded Visual Basic (eVB) programs for the Pocket PC (PPC) and the Handheld PC (HPC).
serial communications communication component library control port visual basic embedded ppc hpc

CryptoText 

The CryptoText encryption library contains COM and .NET components for cross-platform Microsoft Windows text and file encryption on Pocket PC and Desktop, including components for dotNet, .NET CF, COM / ActiveX, PocketPC.
password encryption encrypt com component protection crypto cryptoapi evc ce pocketpc .net dotnet