Introduction - If you have any usage issues, please Google them yourself
Delphi use Indy write the simple chat examples of code, sub-server and message sending side code also some problems, mainly out in reference PublicUn module, if do not want to use, then, this module references deleted, then the the ShowMessage place of InformationDlg and ErrorDlg tit can be removed and then compile and run. In fact, the focus of this code is not PublicUn, but the use of Indy, I hope you will give serious consideration to.