Tried to prevent scrollbars from scrolling as

per MSW, didn't work.
  Added DeleteAllItems event and test to listctrl.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5871 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/listctrl/listtest.h

@@ -34,6 +34,7 @@ public:
     void OnBeginLabelEdit(wxListEvent& event);
     void OnEndLabelEdit(wxListEvent& event);
     void OnDeleteItem(wxListEvent& event);
+    void OnDeleteAllItems(wxListEvent& event);
     void OnGetInfo(wxListEvent& event);
     void OnSetInfo(wxListEvent& event);
     void OnSelected(wxListEvent& event);