VC++设置和获得一组单选按钮的选中状态
....................................\Debug
....................................\.....\Demo.exe
....................................\.....\Demo.ilk
....................................\.....\Demo.obj
....................................\.....\Demo.pch
....................................\.....\Demo.pdb
....................................\.....\Demo.res
....................................\.....\DemoDlg.obj
....................................\.....\StdAfx.obj
....................................\.....\vc60.idb
....................................\.....\vc60.pdb
....................................\Demo.aps
....................................\Demo.cpp
....................................\Demo.dsp
....................................\Demo.dsw
....................................\Demo.h
....................................\Demo.ncb
....................................\Demo.opt
....................................\Demo.plg
....................................\Demo.rc
....................................\DemoDlg.cpp
....................................\DemoDlg.h
....................................\ReadMe.txt
....................................\res
....................................\resource.h
....................................\...\Demo.ico
....................................\...\Demo.rc2
....................................\...\Thumbs.db
....................................\StdAfx.cpp
....................................\StdAfx.h