unicode in win98 (ListCtrl, TreeCtrl)

Hi,
does anybody knows something about problems with
unicode in Win98? I have application where i must
displa data in different encodings, so i decided to
move to unicode. All app data are in UTF-8 and are
converted to unicode when displayed. In WinXP
everything is OK, but not in Win98.
The main problems are:
TextCtrl - displays string ???
ListCtrl - displays empty rows
TreeCtrl - empty rows, bitmaps are hidden

Problem occurs when data are in russian. I am using
english version of windows. Where is problem -
wxPython, wxWindows, Windows? Could use some unicode
font?

Thanks
tomas

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