Encoding & Fonts in wxSmith

[Grit Clef]

Hi everyone,
        Now I meet a problem with Encoding & Fonts in wxSmith. I created a wxWidgets project using wxSmith as UI designer. If I change some text's font to the one which has some non-ASCII characters in its name, then that text will be abnormal, like this. Why is this? Through which method can I make the text normal?