C# 全屏的显示和隐藏

    public class FullScreen
    {
        //private static Rectangle m_rectOld= new Rectangle();
        public static bool SetFullScreen()
        {
            int Hwnd = 0;
            Hwnd = FindWindow("HHTaskBar", null);
            if (Hwnd == 0) return false;
            ShowWindow(Hwnd, SW_HIDE);
            Rectangle rectFull = Screen.PrimaryScreen.Bounds;

            //SystemParametersInfo(SPI_GETWORKAREA, 0, ref m_rectOld, SPIF_UPDATEINIFILE);
            SystemParametersInfo(SPI_SETWORKAREA, 0, ref rectFull, SPIF_UPDATEINIFILE);

            return true;
        }

        public static bool SetNormalScreen()
        {
            int Hwnd = 0;
            Hwnd = FindWindow("HHTaskBar", null);
            if (Hwnd == 0) return false;
            ShowWindow(Hwnd, SW_SHOW);
            //SystemParametersInfo(SPI_SETWORKAREA, 0, ref m_rectOld, SPIF_UPDATEINIFILE);

            return true;
        }

        [DllImport("coredll.dll")]
        public static extern int ShowWindow(int hwnd, int nCmdShow);
        public const int SW_SHOW = 5; public const int SW_HIDE = 0;
        [DllImport("coredll.dll")]
        public static extern int SystemParametersInfo(int uAction, int uParam, ref Rectangle lpvParam, int fuWinIni);
        public const int SPIF_UPDATEINIFILE = 0X1;
        public const int SPI_SETWORKAREA = 47;
        public const int SPI_GETWORKAREA = 48;
        [DllImport("coredll.dll")]
        private static extern int FindWindow(string lpClassName, string lpWindowName);
    }