Editing Windows Notepad (section)

===Unicode detection===
{{Main article|Bush hid the facts}}
On the [[Windows NT family]] of operating systems (including [[Windows 2000]] and [[Windows XP]]), Notepad can detect Unicode files even when they lack a [[byte order mark]]. To do this, it calls the <code>IsTextUnicode()</code> function of the [[Windows API]].<ref>{{cite web |url=https://msdn.microsoft.com/en-us/library/dd318672(v=vs.85).aspx |title=IsTextUnicode() |work=[[MSDN]] |publisher=[[Microsoft]] |access-date=January 28, 2017 |url-status=live |archive-url=https://web.archive.org/web/20160910175750/https://msdn.microsoft.com/en-us/library/dd318672(v=vs.85).aspx |archive-date=2016-09-10}}</ref> Until [[Windows Vista]], this function was imperfect, incorrectly identifying some all-lowercase [[ASCII]] text as UTF-16. As a result, Notepad interpreted a file containing a phrase like "aaaa aaa aaa aaaaa" ("4-3-3-5") as a two-byte-encoded Unicode text file. If a font with support for Chinese was installed, nine Chinese characters (桴獩愠灰挠湡戠敲歡) would display. Otherwise, it would display square [[substitute character]]s instead of Chinese characters. This issue was resolved on Windows Vista and newer.<ref>{{cite web|last=Chen|first=Raymond|date=April 17, 2007|title=The Notepad file encoding problem, redux|url=https://devblogs.microsoft.com/oldnewthing/20070417-00/?p=27223|url-status=live|archive-url=https://web.archive.org/web/20110903031351/http://blogs.msdn.com/b/oldnewthing/archive/2007/04/17/2158334.aspx|archive-date=2011-09-03|access-date=2019-03-20|work=The Old New Thing|publisher=[[Microsoft]]}}</ref><ref>{{cite web|last=Kaplan|first=Michael S.|date=March 25, 2008|title=Bush might've still hid the facts, but he can't hide them from Vista SP1/Server 2008 Notepad|url=http://archives.miloush.net/michkap/archive/2008/03/25/8334796.html|access-date=13 April 2017}}</ref>