说明： 演示如何在xml中保存和读取应用程序参数，同时提供相应的类和源码
(xml demonstrate how to preserve and read application parameters, and provide the type and source)
文件列表：
ParamIO_Demo
............\EditCell.
cpp
............\EditCell.
h
............\ListCtrl.
cpp
............\ListCtrl.
h
............\ParamIO.
cpp
............\ParamIO.
h
............\ParamIO_Demo.
cpp
............\ParamIO_Demo.
dsp
............\ParamIO_Demo.
dsw
............\ParamIO_Demo.
h
............\ParamIO_Demo.
rc
............\ParamIO_DemoDlg.
cpp
............\ParamIO_DemoDlg.
h
............
\res
............\...\ParamIO_Demo.
rc2
............\resource.
h
............\StdAfx.
cpp
............\StdAfx.
h
............\XmlNotify.
h
............\XmlParser.
cpp
............\XmlParser.
h
............\XmlStream.
cpp
............\XmlStream.
h
............\XmlUtil.
h
............\XML_Dialog.
cpp
............\XML_Dialog.
h
............\XML_Node.
cpp
............\XML_Node.
h
