Hello @손 상현,
GetACP function Retrieves the current Windows ANSI code page identifier for the operating system.
LOCALE_IDEFAULTCODEPAGE
means the default oem code page for locale.
LOCALE_IDEFAULTANSICODEPAGE
means the default ansi code page for locale.
GetACP and LOCALE_IDEFAULTANSICODEPAGE
retrieve the same code page identifier for me.