>thank you for your attention. But i found the sample application and docs. Bu i still have the same problem. Because i coded my server app. and i can connect it with telnet. But i can't connect the server app with my client application. I can't find any method to connect the sever in winsock object. thanks again.

I well could be wrong here, but I think that an application using Winsock needs to have Winsock at BOTH ends.