anchor.diff:  constructor TJvDockCustomPanel.Create(AOwner: TComponent);
   begin
     inherited Create(AOwner);
  +  // csParentBackground will be removed after the initial drawaing of the control
     ControlStyle := [csAcceptsControls, csCaptureMouse, csClickEvents,
       csSetCaption, csParentBackground, csOpaque, csDoubleClicks, csReplicatable];
     Color := clBtnFace;
  
positive.code: begin
    SetDockSite(Self, False);
    inherited Destroy;
  end;
  
  function TJvDockCustomPanel.CreateDockManager: IDockManager;
  
negative.code: constructor TJvDockPageControl.Create(AOwner: TComponent);
  begin
    inherited Create(AOwner);
    ControlStyle := [csDoubleClicks, csOpaque];
    FPages := TList.Create;
    FTabSheetClass := TJvDockTabSheet;
  end;
  