I use UTF8 to store data in a sqlite database and convert it to UTF16LE before displaying in GUI. Also I convert user input from UTF16LE to UTF8 before push data into a database. You could look at these function [**here**](https://github.com/little-brother/sqlite-gui/blob/master/src/utils.cpp) (utf16to8 and utf8to16). P.S. I use `TCHAR`-macro instead `wchar_t`.