there is INDY for winsock development,but it's not so good for our projects,so I decided to write a better,pure TCP socket,it's asynchronous,base on WinSock2,use Overlap-I/O,it's a client class,but also can be used as a server class,so it can bind to specific port,even multiple ports,it uses multiple thread techlogy to improve recv/send efficiency. So,it's not the best TCP class,and delphi is an older IDE,but I hope my work can be used by more people around the world, not only my teamates...