public static extern bool IntersectRect(out WinDef.RECT lprcDst, [In] ref WinDef.RECT lprcSrc1, [In] ref WinDef.RECT lprcSrc2);
public static extern bool IsRectEmpty([In] ref WinDef.RECT lprc);
public static extern bool GetWindowRect(IntPtr hWnd, out WinDef.RECT lpRect);
public static extern bool GetWindowRect(HandleRef hwnd, out WinDef.RECT lpRect);