Dialog box which will backup files from source directory to destination directory.这个程序提供了一个对话框，它可以将文件从源目录备份到目的目录。
From now on every directory description will be relative to the extracted source directory and if no information about a从现在起每个目录的描述将会和源文件解压后的目录有关，如果没有专门指出更改到某个特定目录，你应该在源文件目录下.