use ListView_RedrawItems() to implement wxListCtrl::RefreshItems(); added tests for it to the sample

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48717 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/listctrl/listtest.h

@@ -40,6 +40,8 @@ public:
         : wxListCtrl(parent, id, pos, size, style),
           m_attr(*wxBLUE, *wxLIGHT_GREY, wxNullFont)
         {
+            m_updated = -1;
+
 #ifdef __POCKETPC__
             EnableContextMenu();
 #endif
@@ -88,6 +90,9 @@ private:
 
     wxListItemAttr m_attr;
 
+    long m_updated;
+
+
     DECLARE_NO_COPY_CLASS(MyListCtrl)
     DECLARE_EVENT_TABLE()
 };