Thank you very much for taking the time.

Test logs...

wxPerl

..
$self->{label_1} = Wx::StaticText->new($self, -1, "\x{442}\x{44C}\x{438}\x{43B}\x{43F}\x{43E}\x{440}\x{449}\x{43D}\x{435}", wxDefaultPosition, wxDefaultSize, );
..

Tested on Win 7 and xp pro and displayed russian charset; no problem.

Perl/Tk

..
-text => "\x{442}\x{44C}\x{438}\x{43B}\x{43F}\x{43E}\x{440}\x{449}\x{43D}\x{435}",
..

Tested on Win 7 and xp pro. Auto text encoder good! and display russian charset; no problem.

Gtk2

..
my $label = Gtk2::Label->new ('ьиьиьиьиь:');
..

Tested on Win xp pro (not installed gtk2 module on win 7 os) and no encoder! Display directly russian charset; no problem.

But;

My OS win platform :) and supported perl module Win32::GUI

A very stupid situation. :/

I've read at least 30 documents and tried many encode/decode modules but didn't.

The whole project written with Win32::GUI module.Can not change the "win32-gui" module with others!

My Ideas...

Did i use a different module? :)

The current project consists of 15.000 lines. Rewrite project with other perl GUI module? :)

OR

Can i use a combination of 2 modules?

Ex: Win32::GUI and wxPerl(Label) module combination....?

15000 lines... this is much...

Actually fixing Win32::GUI seems more sane, due to your code base.

No, mixing Wx and Win32::GUI does not sound possible to me
again, let's suppose that your codebase is too large to change GUI.

I would advise to contact developers of Win32::GUI to help you.
actually it is even possible to hack a small helper module that will fix your problem.

maybe you could donate some small amount of money to developers of that module so they will provide a normal fix of their module?