Virtual: http://tcl.tk/man/tcl8.5/TkCmd/event.htm#M41
		 https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/virtual-events.html
		 https://stackoverflow.com/questions/64683696/tkinter-difference-between-event-and-event
		 
		 root.event_generate("<<myevent>>", when="tail", state=num)

