视频会议系统中的电子白板源码，用于共享包括文件，图像等的数据-Video Conference System of Whiteboard source for the sharing of documents and images and other data

文本聊天，文件传输；视频传输：截取网上的Avchat的源码（需要filtershow(XP系统中filter字符串可能为‘视频捕获’或者‘capture’，采集传输解码）-Text chat, file transfer video transmission: the interception of the web Avchat source (requires filtershow (XP system in the filter string may be ' video captu