When I open a top-level sub-menu in my Fl_Menu_Bar I then find that it stays dropped down when I move focus away from the menu_bar. The only times it doesn't is if 1) I pass the mouse over another menu item, in which case the second sub-menu drops down, or 2) I click on the menu_bar away from any menu items. This has the effect that all other events in my app seem to be blocked, especially the app close event which is the most infuriating.

I presume I need to handle the UNFOCUS event in the menu_bar, but how do I cause the sub-menu to close.

Alternaively I would like to generate a system noise alert that window close is being ignored.

I am using a recent (23/4/2020) snap-shot of 1.4 on W10 (2004

Thanks in advance

Phil.