How? The answer is: easily. Because these days most systems support Unicode.
Further detail depend on such boring things as platform, language, used libraries, etc. It does not look like you care too much about that. :-)
[EDIT: in response to a follow-up question]
With C++, you need to use "UNICODE macro" through
#define UNICODE
More exactly, please see:
http://www.cplusplus.com/forum/articles/16820/[
^].
Good luck,
—SA