These classes can't be forward-declared any more as they're not really classes
any longer but just compatibility #defines and can't be made classes again as
this would break the existing code using wxBookCtrlEvent in 2.9.
See #14242.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71390
c3d73ce0-8a6f-49c7-b76d-
6d57e0e08775
result in compilation errors due to an ambiguity between them if you pass
NULL as client data. To fix this, cast NULL explicitly to "void**".
+- wxChoicebookEvent, wxListbookEvent, wxNotebookEvent, wxToolbookEvent and
+ wxTreebookEvent are now all synonyms for wxBookCtrlEvent. The existing code
+ using the old names continues to work but they can't be forward-declared
+ any more. Use wxBookCtrlEvent in your code if you need to forward-declare
+ it or just include the appropriate header instead of forward declaration.
+
Deprecated methods and their replacements
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