public static extern IntPtr RealChildWindowFromPoint(IntPtr hwndParent, POINT ptParentClientCoords);
public static extern bool ScreenToClient(IntPtr hWnd, ref POINT lpPoint);
public static extern IntPtr WindowFromPhysicalPoint(POINT pt);
public static extern bool GetCursorPos(out POINT lpPoint);
public static extern IntPtr ChildWindowFromPointEx(IntPtr hWndParent, POINT pt, ChildWindowFromPointExFlags uFlags);
public static extern bool ClientToScreen(IntPtr hWnd, ref POINT lpPoint);
public static extern IntPtr WindowFromPoint(POINT Point);
public static extern IntPtr ChildWindowFromPoint(IntPtr hWndParent, POINT Point);
public static extern unsafe bool GetCursorPos(POINT* lpPoint);
public static extern bool LogicalToPhysicalPoint(IntPtr hwnd, ref POINT lpPoint);
public static extern bool LogicalToPhysicalPointForPerMonitorDPI(IntPtr hwnd, ref POINT lpPoint);
public static extern IntPtr MonitorFromPoint(POINT point, int flags);
public static extern IntPtr MonitorFromPoint(POINT pt, MonitorOptions dwFlags);