{"id":19513,"date":"2009-01-13T10:00:00","date_gmt":"2009-01-13T10:00:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/oldnewthing\/2009\/01\/13\/where-does-shell-windows-com-get-information-about-file-extensions-and-how-do-i-get-in-on-that-action\/"},"modified":"2009-01-13T10:00:00","modified_gmt":"2009-01-13T10:00:00","slug":"where-does-shell-windows-com-get-information-about-file-extensions-and-how-do-i-get-in-on-that-action","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/oldnewthing\/20090113-00\/?p=19513","title":{"rendered":"Where does shell.windows.com get information about file extensions, and how do I get in on that action?"},"content":{"rendered":"<p>If you double-click a file for which there is no registered handler, Windows will offer to visit the Web service on shell.windows.com to locate a program that can open it. But where does this information come from, and how can you add your program to the database?<\/p>\n<p> <a href=\"http:\/\/support.microsoft.com\/kb\/929149\"> Knowledge Base article Q929149<\/a>, titled <i>Windows File Association System <a href=\"http:\/\/blogs.msdn.com\/oldnewthing\/archive\/2008\/05\/22\/8530603.aspx\"> On-Boarding<\/a> Process<\/i>, provides step-by-step instructions on how you can add your file extension. <\/p>\n<p> If you look at the existing entries on shell.windows.com, most of them have relatively straightforward and neutral descriptions. &#8220;<a href=\"http:\/\/shell.windows.com\/fileassoc\/0409\/xml\/redir.asp?Ext=ppt\">This document is a PowerPoint presentation<\/a>.&#8221; &#8220;<a href=\"http:\/\/shell.windows.com\/fileassoc\/0409\/xml\/redir.asp?Ext=mp3\">This document is a sound file<\/a>.&#8221; But there is at least one company that decided to use the file association service for a bit of grandstanding. &#8220;<a href=\"http:\/\/shell.windows.com\/fileassoc\/0409\/xml\/redir.asp?Ext=pdf\">Invented by XYZ company and perfected over 15 years<\/a>, ABC file format lets you capture information from any application, on any computer, and share it with anyone around the world.&#8221; <\/p>\n<p> By the way, if the file association Web service offends you, <a href=\"http:\/\/technet.microsoft.com\/en-us\/library\/bb490825.aspx\"> you can disable it<\/a>. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you double-click a file for which there is no registered handler, Windows will offer to visit the Web service on shell.windows.com to locate a program that can open it. But where does this information come from, and how can you add your program to the database? Knowledge Base article Q929149, titled Windows File Association [&hellip;]<\/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":[26],"class_list":["post-19513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oldnewthing","tag-other"],"acf":[],"blog_post_summary":"<p>If you double-click a file for which there is no registered handler, Windows will offer to visit the Web service on shell.windows.com to locate a program that can open it. But where does this information come from, and how can you add your program to the database? Knowledge Base article Q929149, titled Windows File Association [&hellip;]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/19513","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=19513"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/19513\/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=19513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/categories?post=19513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/tags?post=19513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}