TracePlus/Winsock shows you the interaction between your Win32 application and Winsock 1.1/2.0, WININET, RAS, and Microsoft Winsock extensions with no modifications to your existing program
The EasyCom ActiveX control is a Winsock/Telnet communication component. It is intended for VB and VC++ developers to easily add communication capabilities to their applications.
The Winsock Interface Library simplifies winsock network communications programming and
provides support for the most common Internet protocols such as Finger, SMTP, POP3, FTP,
NNTP, and HTTP. Includes multiple C/C++ examples.