undisable many warnings for VC++ in defs.h and fixed several thousands of them in the sources

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22222 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/dc.h

@@ -254,6 +254,9 @@ class WXDLLEXPORT wxDCTemp : public wxDC
 public:
     wxDCTemp(WXHDC hdc) { SetHDC(hdc); }
     virtual ~wxDCTemp() { SetHDC((WXHDC)NULL); }
+
+private:
+    DECLARE_NO_COPY_CLASS(wxDCTemp)
 };
 
 #endif