'宣言 Public Class DropIndicatorControl Inherits System.Windows.Forms.Control Implements Infragistics.Win.Layout.ILayoutItem, Infragistics.Win.UltraWinDock.IDockingArea, Infragistics.Win.UltraWinDock.IDockingAreaEx
public class DropIndicatorControl : System.Windows.Forms.Control, Infragistics.Win.Layout.ILayoutItem, Infragistics.Win.UltraWinDock.IDockingArea, Infragistics.Win.UltraWinDock.IDockingAreaEx