Windows Me/98/95, Windows NT 4.0: A specific bit pattern that determines the relationship between the character coverage needed to support the locale and the font contents. Note that LOCALE_FONTSIGNATURE data takes a different form from all other locale information. All other locale information can be expressed in a string form or as a number. LOCALE_FONTSIGNATURE data is retrieved in a LOCALESIGNATURE structure.
Build date: 11/16/2013