protected override CreateParams CreateParams        {            get            {                const int WS_EX_APPWINDOW = 0x40000;                const int WS_EX_TOOLWINDOW = 0x80;                CreateParams cp = base.CreateParams;                cp.ExStyle &= (~WS_EX_APPWINDOW);    // 不显示在TaskBar                cp.ExStyle |= WS_EX_TOOLWINDOW;      // 不显示在Alt+Tab                return cp;            }        }