anchor.diff:    FTabIndex:= 0;
     FTabIndexOver:= -1;
     FTabIndexHinted:= -1;
  +  FTabIndexAnimated:= -1;
  +  FAnimationOffset:= 0;
     FTabList:= TCollection.Create(TATTabData);
     FTabMenu:= nil;
     FScrollPos:= 0;
  
positive.code:   if Data=nil then exit;
  
    Enabled:= false;
  
    case FOptPosition of
      atpTop,
  
negative.code:       end;
    end;
  
    FTabIndexAnimated:= -1;
    Enabled:= true;
  end;
  
  