`tdbdropdowncols`

`tnolistdropdowncols`

`tdropdowncols`
		create
		destroy
		getitemclasstype
		createfont
		createfontselect

`tdropdowndatacols`
		create
		getitemclasstype
		beginupdate
		endupdate
		clear
		addrow
		insertrow
		deleterow
		getrow

`townedpersistentarrayprop`
		create

`tpersistentarrayprop`
		create
		destroy
		itemdestroyed
		assign
		propkind
		displayname
		add
		indexof
		getitemclasstype

`tarrayprop`
		propkind
		beginupdate
		endupdate
		clear
		insertempty
		insertdefault
		delete
		move
		order
		reorder
		link