first phase of transition to unified Unicode build:

1. changed c_str() to return wxCStrData (implicitly convertible to wxChar*)
2. added template type-safe wrappers for vararg functions
3. added wxUniChar class representing single Unicode character
4. changed wxString::operator[] and wxString::iterator to return wxUniChar


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44865 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/dlmsw.cpp

@@ -191,7 +191,7 @@ wxString wxVersionDLL::GetFileVersion(const wxString& filename) const
     wxString ver;
     if ( m_dll.IsLoaded() )
     {
-        wxChar *pc = wx_const_cast(wxChar *, filename.c_str());
+        wxChar *pc = wx_const_cast(wxChar *, filename.wx_str());
 
         DWORD dummy;
         DWORD sizeVerInfo = m_pfnGetFileVersionInfoSize(pc, &dummy);