What you're doing is asking the OS to select a font for you. If you don't
care what character set you want, which seems unlikely, then you can choose
the default. If you know that you're displaying Shift-JIS characters, you
specify that. If you're displaying Russian language strings, choose that,
etc. We can't tell you what to pick; you have to select what matches the
text you are going to display using the font.
Paul T.