Note: New OS feature 'Beta: Use Unicode UTF-8 for worldwide language support' since win10/win11
- OFF: GetACP() equal to current system locale, such as chinese simplified is 936, english is 437
- ON: GetACP() always equal to 65001(UTF-8)
Remark:
The macro CP_ACP for ntcvt::from_chars works for converting chraset from current code page(936,437,65001) to utf-16