'宣言 Public Sub DragSpanMove( _ ByVal pointInControlCoords As Point, _ ByVal dragElement As UIElement, _ ByVal headerDragItem As ILayoutItem, _ ByVal columnDragItem As ILayoutItem _ )
public void DragSpanMove( Point pointInControlCoords, UIElement dragElement, ILayoutItem headerDragItem, ILayoutItem columnDragItem )