There are thousands of applications and millions of lines of code written in MFC, and it's increasingly common for organizations and individuals to migrate from MFC to wxWidgets to take advantage of other platforms and markets. Porting is easier than you might think because the wxWidgets API has many concepts and constructs that are similar to those in MFC. This appendix gives you an idea of what's involved, provides comparisons for particular features, and suggests some porting strategies.