{"id":13463,"date":"2010-07-09T07:00:00","date_gmt":"2010-07-09T07:00:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/oldnewthing\/2010\/07\/09\/whats-the-difference-between-lastwritetime-and-changetime-in-file_basic_info\/"},"modified":"2010-07-09T07:00:00","modified_gmt":"2010-07-09T07:00:00","slug":"whats-the-difference-between-lastwritetime-and-changetime-in-file_basic_info","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/oldnewthing\/20100709-00\/?p=13463","title":{"rendered":"What's the difference between LastWriteTime and ChangeTime in FILE_BASIC_INFO?"},"content":{"rendered":"

The FILE_BASIC_INFO<\/code> structure contains a number of fields which record the last time a particular action occurred. Two of the fields seem to describe the same thing.<\/p>\n

\n
\n
Last­Write­Time <\/dt>\n
\n
The time the file was last written to.<\/p>\n
\n
Change­Time <\/dt>\n
\n
\n

The time the file was changed.<\/p>\n<\/dd>\n<\/dl>\n<\/dl>\n<\/dd>\n<\/dl>\n<\/dl>\n<\/blockquote>\n

What’s the difference between writing to a file and changing it?\n I’m told that the difference is metadata. The Last­Write­Time covers writes to the file’s data stream (which you accomplish via the Write­File<\/code> function). On the other hand, the Change­Time also includes changes to the file metadata, such as changing its file attributes (hidden, read-only, etc<\/i>.) or renaming the file.<\/p>\n

(And don’t forget that Last­Access­Time updates are off by default now<\/a>.) <\/p>\n","protected":false},"excerpt":{"rendered":"

The FILE_BASIC_INFO structure contains a number of fields which record the last time a particular action occurred. Two of the fields seem to describe the same thing. Last­Write­Time The time the file was last written to. Change­Time The time the file was changed. What’s the difference between writing to a file and changing it? I’m […]<\/p>\n","protected":false},"author":1069,"featured_media":111744,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[25],"class_list":["post-13463","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oldnewthing","tag-code"],"acf":[],"blog_post_summary":"

The FILE_BASIC_INFO structure contains a number of fields which record the last time a particular action occurred. Two of the fields seem to describe the same thing. Last­Write­Time The time the file was last written to. Change­Time The time the file was changed. What’s the difference between writing to a file and changing it? I’m […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/13463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/users\/1069"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/comments?post=13463"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/13463\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media\/111744"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media?parent=13463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/categories?post=13463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/tags?post=13463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}