Example-programs:

hello-world.c    - minimum
tst_lst1.c       - List from file
tst_lst2.c       - List from file
tst_ed1.c        - Editor
tst_gui1.c       - all widgets
tst_gui2.c       - all widgets

tst_gui_gl1.c    - OpenGL for tst_gui1
tst_gui_gl2.c    - OpenGL for tst_gui2
tst_surf2.c      - OpenGL for tst_gui2