public static extern bool GetCursorPos(out NativeStructs.POINT lpPoint);
public static extern IntPtr RealChildWindowFromPoint(IntPtr hwndParent, NativeStructs.POINT ptParentClientCoords);
public static extern IntPtr WindowFromPoint(NativeStructs.POINT Point);
public static extern IntPtr ChildWindowFromPoint(IntPtr hWndParent, NativeStructs.POINT Point);
public static extern bool ScreenToClient(IntPtr hWnd, ref NativeStructs.POINT lpPoint);