public static extern IntPtr GetBkInfoManager(IntPtr hWindow, XWndPos nPosition);
public static extern bool BindLayoutEle(IntPtr hWindow, XWndPos nPosition, IntPtr hEle);
public static extern void BindLayoutObject(IntPtr hWindow, XWndPos nPosition, IntPtr hLayout);
public static extern IntPtr GetLayoutObject(IntPtr hWindow, XWndPos nPosition);