DWORD cbWritten;
wxString s = wxString::FormatV(format, argptr);
- ::WriteFile(m_hFile, s, s.length() * sizeof(wxChar), &cbWritten, 0);
+
+ wxCharBuffer buf(s.mb_str(wxConvUTF8));
+ ::WriteFile(m_hFile, buf.data(), strlen(buf.data()), &cbWritten, 0);
va_end(argptr);
}