restored using DeferWindowPos() for moving all windows at once (this does help with flicker somewhat) but now call EndDeferWindowPos() from WM_WINDOWPOSCHANGED handler, not WM_SIZE one which is never generated for the dialogs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31232 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/window.h

@@ -493,6 +493,10 @@ private:
     // number of calls to Freeze() minus number of calls to Thaw()
     unsigned int m_frozenness;
 
+    // current defer window position operation handle (may be NULL)
+    HANDLE m_hDWP;
+
+
     DECLARE_DYNAMIC_CLASS(wxWindowMSW)
     DECLARE_NO_COPY_CLASS(wxWindowMSW)
     DECLARE_EVENT_TABLE()