ODBC updates

Documentation updates


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1355 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/pen.tex

@@ -20,6 +20,12 @@ get a pointer to a pen by using the global list of pens {\bf
 wxThePenList}, and calling the member function {\bf FindOrCreatePen}.
 See the entry for \helpref{wxPenList}{wxpenlist}.
 
+wxPen uses a reference counting system, so assignments between brushes are very
+cheap. You can therefore use actual wxPen objects instead of pointers without
+efficiency problems. Once one wxPen object changes its data it will create its
+own pen data internally so that other pens, which previously shared the
+data using the reference counting, are not affected.
+
 TODO: an overview for wxPen.
 
 \wxheading{See also}