WinFrom窗体始终置顶

调用WindowsAPI使窗体始终保持置顶效果，不被其他窗体遮盖：

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int Width, int Height, int flags);
        /// 
 
        /// 得到当前活动的窗口 
        /// 
 
        ///  
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern System.IntPtr GetForegroundWindow();

使用方式：在需要置顶的窗体的Load方法里面加上

        //Load
        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                SetWindowPos(this.Handle, -1, 0, 0, 0, 0, 1 | 2);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            //3764           
        }