I just had another, far more useful, thought
If you look at the charset setting of the font, you will discover that fonts
like WingDings and Webdings are SYMBOL_CHARSET which is a bit of a giveaway
for not being human-readable text, and the @SimHei and @SimSun fonts
mentioned in my other post are GB3212_CHARSET.
Other CHARSET possibilities include
ANSI_CHARSET, BALTIC_CHARSET, CHINESEBIG5_CHARSET,
DEFAULT_CHARSET, EASTEUROPE_CHARSET, GB2312_CHARSET,
GREEK_CHARSET, HANGUL_CHARSET, MAC_CHARSET,
OEM_CHARSET, RUSSIAN_CHARSET, SHIFTJIS_CHARSET,
TURKISH_CHARSET, VIETNAMESE_CHARSET,
JOHAB_CHARSET, ARABIC_CHARSET,
HEBREW_CHARSET, THAI_CHARSET
All the Best
Julian Nicholls