Make event overview doc more clear about instances of wxEvtHandler

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@49223 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/tevent.tex

@@ -268,8 +268,9 @@ defining the appropriate event table, and then call
 \rtfsp\helpref{wxWindow::SetEventHandler}{wxwindowseteventhandler} (or, preferably,
 \rtfsp\helpref{wxWindow::PushEventHandler}{wxwindowpusheventhandler}) to make this
 event handler the object that responds to events. This way, you can avoid
-a lot of class derivation, and use the same event handler object to
-handle events from instances of different classes. If you ever have to call a window's event handler
+a lot of class derivation, and use use instnaces of the same event handler class (but different
+objects as the same event handler object shouldn't be used more than once) to
+handle events from instances of different widget classes. If you ever have to call a window's event handler
 manually, use the GetEventHandler function to retrieve the window's event handler and use that
 to call the member function. By default, GetEventHandler returns a pointer to the window itself
 unless an application has redirected event handling using SetEventHandler or PushEventHandler.