说明：  Delphi 使用Indy控件开发的一个通讯的程序，检测在线状态，登陆，服务端自动发送广播消息。 同时在线200个没有问题。 连接数太多好像不理想。因为离线，掉线，登陆等操作频繁。
(Delphi using Indy control the development of a communications procedure, test online, landing, Service client automatically sends radio message. At the same time, online 200 no problem. Too many connections does not seem ideal. Since off-line, dropped, landing operations, such as frequent.)