ime

 GetSystemMetrics WM_IME_CONTROL

https://docs.microsoft.com/zh-TW/windows/win32/intl/nls-terminology

 code  ImmGetCandidateList

https://docs.microsoft.com/zh-tw/windows/win32/intl/input-method-manager

https://docs.microsoft.com/zh-tw/windows/win32/intl/input-method-manager-messages

https://mugichoko.hatenablog.com/entry/2018/10/27/003856

https://dragon-john.blogspot.com/2013/06/c-win7.html