-tn0015.txt How to add new bitmaps to wxWindows UI elements
-tn0016.txt How to add new files and libraries to wxWindows build system
-tn0017.txt How to write unit tests for wxWindows classes
+tn0015.txt How to add new bitmaps to wxWidgets UI elements
+tn0016.txt How to add new files and libraries to wxWidgets build system (Bakefile)
+tn0017.txt How to write unit tests for wxWidgets classes
+tn0018.txt How to add a new font encoding/charset to wxWidgets
+tn0019.txt Special notes about writing wxMSW code
+tn0020.txt Binary Compatability and wxWidgets
+tn0021.txt How to add a new wxUSE_XXX preprocessor constant