`idblookupdbdispfieldlink`
		setlookupvalue
		lookuptext
		getlookupvaluefieldtypes

`idblookupdispfieldlink`
		formatchanged
		refreshfieldvalue

`idbdispfieldlink`
		fieldtovalue
		setnullvalue
		getwidget
		getfieldtypes
		getfieldlink

`inullinterface`