Arbortext IsoView > Programmer's Reference > Properties > HomeViewPort
  
HomeViewPort
Use this read-only property to retrieve the home viewport set by the first call to Iso3OpenFile or SetHome. It returns the home viewport as BSTR. (See Iso3OpenFile and SetHome.)
Introduced with Arbortext IsoView 2.0.
form1.edtHV.value = document.ivx1.HomeViewPort