局域网两方即时通讯，可传输文本和图片，不需设置服务端和客户端。部分功能可扩展，需在本机上注册按钮控件。-Used for lan chatting that you can send text or picture,size not more than 10M.You need not set server or client.Some function can be extend such as group chatting or transmit big file.