more MSLU fixes and moved MSLU stuff into separate file

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14290 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/filefn.cpp

@@ -114,7 +114,8 @@
 
 #ifdef __WINDOWS__
     #include <windows.h>
-
+    #include "wx/msw/mslu.h"
+    
     // sys/cygwin.h is needed for cygwin_conv_to_full_win32_path()
     //
     // note that it must be included after <windows.h>
@@ -1803,28 +1804,3 @@ bool wxMatchWild( const wxString& pat, const wxString& text, bool dot_special )
 #ifdef __VISUALC__
     #pragma warning(default:4706)   // assignment within conditional expression
 #endif // VC++
-
-//------------------------------------------------------------------------
-// Missing functions in Unicode for Win9x
-//------------------------------------------------------------------------
-
-// NB: MSLU only covers Win32 API, it doesn't provide Unicode implementation of
-//     libc functions. Unfortunately, some of MSVCRT wchar_t functions
-//     (e.g. _wopen) don't work on Windows 9x, so we have to workaround it
-//     by calling the char version. We still want to use wchar_t version on
-//     NT/2000/XP, though, because they allow for Unicode file names.
-#if wxUSE_UNICODE_MSLU
-
-    #if defined( __VISUALC__ ) \
-        || ( defined(__MINGW32__) && wxCHECK_W32API_VERSION( 0, 5 ) ) \
-        || ( defined(__MWERKS__) && defined(__WXMSW__) )
-    WXDLLEXPORT int wxOpen(const wxChar *name, int flags, int mode)
-    {
-        if ( wxGetOsVersion() == wxWINDOWS_NT )
-            return _wopen(name, flags, mode);
-        else
-            return _open(wxConvFile.cWX2MB(name), flags, mode);
-    }
-    #endif
-
-#endif // wxUSE_UNICODE_MSLU