The QuickPopup application supports the chat mode for interactive dialogues via local network.

To enable the chat mode:

1. Arrange Send and Received windows so as not to cross each other
2. Right-click on the QuickPopup icon in the System tray and choose Preferences...
3. In the Views section, turn the "Close after send" checkbox off
4. In the "When message arrives" section, turn the "Show last message" checkbox on

Now you can send and receive messages like in a chat room.