Workflow: 1). OnInit - ensure that the framework will call TrackViewState, LoadViewState and SaveViewState. We expect that all child docks will be created here. 2). TrackViewState - raise LoadDockLayout event in order to let the developer to supply the initial parents of the registered docks, because the docks could be created with different parents than needed. 2a). LoadViewState - loads and applies the dock parents from the ViewState in order to persist the dock positions between the page postbacks. 3). LoadPostData - returns true to ensure that RaisePostDataChangedEvent() 3a). Dock_DockZoneChanged - this event is raised by each dock in its LoadPostData method. We handle this event and store the pair UniqueName/NewDockZoneID in the _clientPositions Dictionary. This Dictionary will be used in #4. 4). RaisePostDataChangedEvent - sets the parents of the registered docks according their positions, set on the client. These positions are stored in the _clientPositions Dictionary. 5). OnLoad, other events, such as Click, Command, etc. If you create a dock here it will be rendered on the page, but if it is not recreated in the next OnInit, it will not persist its position, set on the client! 6). SaveViewState - stores the dock parents in the ViewState in order to persist their positions between the page postbacks. 7). Page_SaveStateComplete - raises the SaveDockLayout event to let the developer to save the state in a database or other storage medium. Note: The dock parents will be stored in the ViewState if StoreLayoutInViewState is set to true (default). Otherwise the developer should take care of the dock positions when the page is posted back.

public class KaxDockLayout : Control, 
	IDockLayout, ISkinnableControl, IControl

Public Class KaxDockLayout
	Inherits Control
	Implements IDockLayout, ISkinnableControl, IControl

public ref class KaxDockLayout : public Control, 
	IDockLayout, ISkinnableControl, IControl

type KaxDockLayout =  
    class
        inherit Control
        interface IDockLayout
        interface ISkinnableControl
        interface IControl
    end