程序運行時當你按Alt+Tab時不顯示你的這個窗體程序

        protected override CreateParams CreateParams
        {
            get
            {
                int WS_EX_TOOLWINDOW = 0x80;
                CreateParams CP = base.CreateParams;

                CP.ExStyle = CP.ExStyle | WS_EX_TOOLWINDOW;
                return CP;
            }
        }

        protected override CreateParams CreateParams
        {
            get
            {
                const int WS_EX_APPWINDOW = 0x00040000;
                const int WS_EX_TOOLWINDOW = 0x00000080;

                CreateParams result = base.CreateParams;
                result.ExStyle = result.ExStyle & (~WS_EX_APPWINDOW);
                result.ExStyle = result.ExStyle | WS_EX_TOOLWINDOW;
                return result;
            }
        }