此为双击打开文件，双击对应的文件可以启动该软件并显示文件路径，但是没有实现文件关联功能，本小程序只是演示了在文件关联后，双击文件如何获得该文件路径。-This is the double-click to open the file, double-click the corresponding document can activate the software and display the file path, but no files associated functions, the procedure is a small demonstration in the file association, double-click a document on how to obtain the file path.