When you open a file by a URL from the Windows file dialogue box, Windows will open a local copy of the file, located in the Internet Explorer cache. The %PRODUCTNAME file dialogue box opens a local copy of the file in the system's temp folder.
如果从 Windows 文件对话框通过 URL 打开一个文件，Windows 就会打开位于 Internet Explorer 缓冲区中的该文件的本地副本。%PRODUCTNAME 文件对话框打开位于系统临时文件夹中文件的本地副本。