anchor.diff:    FColorArrowOver:= $E0E0E0;
     FColorScrollMark:= FColorDropMark;
   
  -  FOptShowAtBottom:= false;
     FOptTabAngle:= 4;
     FOptUseAngleForMaxTabs:= 10;
     FOptTabHeight:= 24;
  
positive.code:   if TabCount>0 then
    begin
      D:= GetTabData(TabCount-1);
      Result:= Max(0, D.TabRect.Right - RDown.Left + FOptSpaceInitial + 2);
    end;
  end;
  
  
negative.code:   if IsClick then     
    begin
      DoHandleClick;
      Invalidate;
      Exit
    end;
  end;
  