winform窗体逐步关闭特效

winform窗体渐渐关闭特效

        #region 关闭窗体特效
        //导入user32.dll
        [System.Runtime.InteropServices.DllImport("user32")]
        //声明API函数
        private static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);
        //正面_水平方向
        const int AW_HOR_POSITIVE = 0x0001;
        //负面_水平方向
        const int AW_HOR_NEGATIVE = 0x0002;
        //正面_垂直方向
        const int AW_VER_POSITIVE = 0x0004;
        //负面_垂直方向
        const int AW_VER_NEGATIVE = 0x0008;
        //由中间四周展开或由四周向中间缩小
        const int AW_CENTER = 0x0010;
        //隐藏对象
        const int AW_HIDE = 0x10000;
        //显示对象
        const int AW_ACTIVATE = 0x20000;
        //拉幕滑动效果
        const int AW_SLIDE = 0x40000;
        //淡入淡出渐变效果
        const int AW_BLEND = 0x80000;
        #endregion

       然后再关闭窗体前加以下代码：

       AnimateWindow(this.Handle, 1000, AW_CENTER | AW_HIDE | AW_HOR_NEGATIVE);