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

include/wx/msw/wrapcctl.h

@@ -43,5 +43,17 @@
 // define things which might be missing from our commctrl.h
 #include "wx/msw/missing.h"
 
+// Set Unicode format for a common control
+inline void wxSetCCUnicodeFormat(HWND hwnd)
+{
+    SendMessage(hwnd, CCM_SETUNICODEFORMAT,
+#if wxUSE_UNICODE
+                TRUE
+#else
+                FALSE
+#endif
+                , 0);
+}
+
 #endif // _WX_MSW_WRAPCCTL_H_