anchor.diff:      atbxShowNone,
       atbxShowAll,
       atbxShowActive,
  -    atbxShowMouseOver
  +    atbxShowMouseOver,
  +    atbxShowActiveAndMouseOver
       );
   
   //int constants for GetTabAt
  
positive.code:     if FOptVarWidth then
      begin
        C.Font.Style:= Data.TabFontStyle;
        TempCaption:=
          Format(FOptShowNumberPrefix, [i+1]) +
          FOptShowModifiedText +
  
negative.code:       Result:= AIndex=FTabIndex;
      atbxShowMouseOver:
        Result:= AIndex=FTabIndexOver;
      atbxShowActiveAndMouseOver:
        Result:= (AIndex=FTabIndex) or (AIndex=FTabIndexOver);
      else
        Result:= false;
    end;
  