说明： 代码中演示了用Dom解析XML，创建修改XML，并最后用SAX来整理XML的格式，然后输出
(code demonstrated with Dom parsing XML, XML to create change, and eventually used to collate SAX XML format, and then output)
文件列表：
PlayXML
.......\changeMyBook.xml
.......\manifest.xml
.......\manifestaaa.xml
.......\msxml2.lib
.......\msxml3.tlh
.......\msxml3.tli
.......\myBook.xml
.......\PlayXML.cpp
.......\PlayXML.dsp
.......\PlayXML.dsw
.......\PlayXML.ncb
.......\PlayXML.opt
.......\PlayXML.plg
.......\test.xml
