I couldn't find in MSDN flags for Windows CE compilers similar to the
GCC compiler that change representation of strings in C-code. The
Microsoft recommend so called TCHAR technology that depend from UNICODE
define I answer itself.


From MSDN isn't so clear what is status of CE version 6.0 - R2?. The
documentation of CE 5.0 looks complete, include details for compiler,
migration guide.

About wince_compatibility.h/c - it is just a part of the patch
(PythonCE-2.5-20061219). If we look in the complete patch we see changes
like GetLocaleInfo->GetLocaleInfoA(_localemodule.c) but 
windll.kernel32.GetProcAddress->cdll.coredll.GetProcAddressW
(test_random_things.py). Another change (posixmodule.c)
CRYPTACQUIRECONTEXTA->CRYPTACQUIRECONTEXT.

So we see changes from xxx to xxxA, xxx to xxxW, xxxA to xxx (!).

If this patch required for CE 5.0 ? If not why to change now for may
upcoming 6.0 ?
If the python switch to W functions then the issue will be resolved.
Without general switch to W functions and to wide strings we need to
convert every time from single chat to wide char. Is this acceptable in
general ? (for the particular case yes - the method is called rarely).