说明：  本聊天发送器类似于oicq的消息发送机制，不过他只能够发送简单的字符串。虽然简单，但他也是一个很好的VC网络学习例子。
(the transmitter similar to the Live messaging mechanism, but he could only send a simple string. Although simple, but he is also a very good example of VC network learning.)