By default, the LaneResizeType property is exLaneResizeUndefined, which indicates that the control's LaneResizeType property specifies how the pool resizes the lanes, once the user resizes the pool ( valid for all pools ). The LaneResizeType property specifies how the pool resizes the lanes, once the user resizes the pool ( valid for a specific pool ).

The following screen shot shows the pool before resizing it:

The following screen shot shows the pool resized while the LaneResizeType property is exLaneResizeProportionally ( by default ):

The following screen shot shows the pool resized while the LaneResizeType property is exLaneResizeLast: