LOCALE_S1159 and LOCALE_SAM
String for the AM designator (first 12 hours of the day). The maximum number of characters allowed for this string, including a terminating null character, is different for different releases of Windows.
Windows XP: Thirteen including a terminating null character for SetLocaleInfo. Fifteen including a terminating null character for GetLocaleInfo.
Windows Me/98/95, Windows NT 4.0, Windows 2000: Nine including a terminating null character.
Windows Server 2003 and later: Fifteen including a terminating null character.
Windows 10 added the value LOCALE_SAM as a more readable synonym for LOCALE_S1159.
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