`tcustomdropdowncontroller`
		create
		destroy
		hasdropdown
		dostatread
		dostatwrite
		dropdown
		canceldropdown
		dropdownactivated
		dropdowndeactivated
		dataselected

`teventpersistent`

`tlinkedpersistent`
		destroy
		setlinkedvar

`tnullinterfacedpersistent`

`tvirtualpersistent`
		create