VB批量删除指定类型的文件，选择列表里的指定文件类型，浏览到需要删除存储文件的目录，即可立即删除文件，是批量操作，请谨慎。-VB batch delete specified type of file, select list specified file type, browse to need to delete the storage file directory, then immediately delete files, is batch operation, please care