Forum Post: RE: How does MF INVOKE interface with windows?

thanks, in my haste i missed the separate pages for listview / item / header. HOWEVER... in a quick " SetLabel" method test, I get error "240 obj ref not valid lsthdr" using code below. The justification code works so the obj ref is fine. The Term-field parameter is the one used in the original code above to set the col header in the first place so should also be fine.             evaluate LVdats2-ITEM-ALIGN(k)               when "R"                   INVOKE LVdats2-item-objref(k) "rightJustified"               when "C"                   INVOKE LVdats2-item-objref(k) "centered"               when other                       INVOKE LVdats2-item-objref(k) "leftJustified"             end-evaluate             invoke LVdats2-item-objref(k) "SetLabel" using Term-Field