added wxSetCCUnicodeFormat() and use it in wxTreeCtrl/wxToolBar; also replaced SendMessage(LVM_SETUNICODEFORMAT) with a call to it in wxListCtrl

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/listctrl.cpp

@@ -353,9 +353,7 @@ bool wxListCtrl::Create(wxWindow *parent,
 
     // explicitly say that we want to use Unicode because otherwise we get ANSI
     // versions of _some_ messages (notably LVN_GETDISPINFOA) in MSLU build
-#if wxUSE_UNICODE
-    ::SendMessage(GetHwnd(), LVM_SETUNICODEFORMAT, TRUE, 0);
-#endif
+    wxSetCCUnicodeFormat(GetHwnd());
 
     // for comctl32.dll v 4.70+ we want to have this attribute because it's
     // prettier (and also because wxGTK does it like this)