I don't believe so.
One way is to measure the height of a single row, for example 20 pt. and name the portal 'portal'. If the default view has 3 rows showing and you enlarge the window and 13 rows show, you will know:
3 * 20 = 60 height
? * 20 = 264 height
Div ( GetLayoutObjectAttribute( "portal";"height") ; 20 )
That works great! Thank you LaRetta!