How to show Unicode characters on MS Windows?

[quique]

I need to show Unicode characters in a QLabel. This code works fine on Debian, but on Windows I just get a square.
FWIW, the browser does show this character when used in a webpage, and I can copy/paste it in Wordpad, so I guess it's not a font issue.
What am I missing?

#include <QtGui/QApplication>
#include <QLabel>
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QLabel label(QChar(10269)); // ⠝ (U+281D) is points 1,3,4,5 in Braille
    label.show();
 
    return app.exec();
}

#include <QtGui/QApplication>
#include <QLabel>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QLabel label(QChar(10269)); // ⠝ (U+281D) is points 1,3,4,5 in Braille
    label.show();
    
    return app.exec();
}

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