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