Development: Porting to 2.9/3.0
This page offers an overview over the changes in 2.9/3.0 that might ask for changes in your applications. We try to keep it updated so that it becomes kind of a knowledge base.
The most prominent change is the transparent unicode mode, the removal of the distinction between ANSI and Unicode builds, so use of the wxChar type and wxT macro is no longer necessary.
For a backgrounder on these changes see here