As ListView is a library object you would need a control reference rather than a name string to use with AddControl.
ViewTable.AddControl(ViewTasks.ControlRef,0,20,20)
You need to do this with any control from the ControlsEx library.
e.g
AddObject("PBar", "ProgressBar")
PBar.new1("Form1",0,0,100,10)
ViewTable.AddControl(PBar.ControlRef,0,40,40)
Unfortunately Listview doesn't seem to have a ControlRef property that exposes the underlying Listview control so I am afraid you can't use it on a Tab