In user’s guide v5_20, at chapter of “Writing a Graphical User Interface”
For a standalone version, there are two examples, example2a.cxx and example2b.cxx, respectively.
In example2b.cxx, there is no main() function.
Is it possible to run without main() function?
I got some errors caused by missing main() function.
By the way, in example2a.cxx, there is main() function.