The event handler receives an argument of type RebarRowEventArgs containing data related to this event. The following RebarRowEventArgs property provides information specific to this event.
There are three operations that can cause this event to be raised:
When a band is added to a Rebar control, and the height component of the band's MinimumSize is larger than the height of the row to which it was added.
When a band is removed from a Rebar control, and the height component of the band's MinimumSize was the largest of the other bands in the row that contained it.
When a band is dragged to a new row by the user and the minimum height of the band is larger than the height of the new row, or was the largest of the other bands in the old row.