Added IsScrollng() support for scroll and scrollwin events

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5506 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -3393,8 +3393,11 @@ bool wxWindow::MSWOnScroll(int orientation, WXWORD wParam,
         event.m_eventType = wxEVT_SCROLLWIN_PAGEDOWN;
         break;
 
-    case SB_THUMBTRACK:
     case SB_THUMBPOSITION:
+        event.m_isScrolling = FALSE;
+        /* fall-through */
+
+    case SB_THUMBTRACK:
         event.m_eventType = wxEVT_SCROLLWIN_THUMBTRACK;
         break;