not using wxList keyed interface (the same used when wxUSE_STL == 1),
the only incompatibility being that Next() returns a wxHashTable::Node*
instead of a wxNode*.
+- non-const wxDC methods GetBackground(), GetBrush(), GetFont() and GetPen()
+ don't exist any more, please fix your code -- it never worked correctly
+ anyhow if you modified the objects returned by these methods so you should
+ simply switch to using const methods.
wxTaskBarIcon must be explicitly destroyed now, otherwise the application
won't exit even though there are no top level windows