多线程保存文件、显示进度条、对话框大小可变
..........................................\FileDemo
..........................................\........\FileDemo.aps
..........................................\........\FileDemo.cpp
..........................................\........\FileDemo.h
..........................................\........\FileDemo.rc
..........................................\........\FileDemo.vcproj
..........................................\........\FileDemo.vcproj.QRSX32.Administrator.user
..........................................\........\FileDemo.vcproj.QRSX6231.Administrator.user
..........................................\........\FileDemoDlg.cpp
..........................................\........\FileDemoDlg.h
..........................................\........\ReadMe.txt
..........................................\........\res

..........................................\........\...\FileDemo.rc2
..........................................\........\resource.h
..........................................\........\stdafx.cpp
..........................................\........\stdafx.h
..........................................\FileDemo.sln