用常規方法實現全屏顯示時，由於采用的三方控件導致界面頂端一直有一條半透明的類似標題欄的東西無法去除，原因一直沒找到。

下面綜合整理下網上兩位博主的用WindowsAPI實現全屏的方法：

控件全屏顯示： http://www.cnblogs.com/lmcblog/archive/2012/07/14/2591501.html

任務欄、開始菜單欄顯示隱藏：http://www.cnblogs.com/ITBread/p/3503801.html

我把代碼整理下，方便下次自己查看

1、任務欄、菜單欄的顯示與隱藏

 [DllImport("user32.dll")]
        public static extern bool
 
 GetCursorPos(ref Point lpPoint);

        [DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]
        public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("user32.dll", EntryPoint = "ShowWindow
 
", SetLastError = true)]
        public static extern bool ShowWindow(IntPtr hWnd, uint nCmdShow);

        public static Point GetCursorPos()
        {
            Point point = new Point();
            GetCursorPos(ref point);
            return point;
        }

        public static void HideTask(bool
 
 isHide)
        {
            try
            {
                IntPtr trayHwnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, "Shell_TrayWnd", null);
                IntPtr hStar = FindWindowEx(IntPtr.Zero, IntPtr.Zero, "Button", null);

                if (isHide)
                {
                    ShowWindow(trayHwnd, 0);
                    ShowWindow(hStar, 0);
                }
                else
                {
                    ShowWindow(trayHwnd, 1);
                    ShowWindow(hStar, 1);
                }
            }
            catch { }
        }

2、控件的全屏與取消

{ 
           WindowFullScreenApi.HideTask(true);//先隱藏工具欄
            var axTeWnd = axTe3DWindow;
            axTeWnd.Dock = DockStyle.None;
            axTeWnd.Left = 0;
            axTeWnd.Top = 0;
            axTeWnd.Width = Screen.PrimaryScreen.Bounds.Width;//獲取顯示器大小
            axTeWnd.Height = Screen.PrimaryScreen.Bounds.Height;
            WindowFullScreenApi.SetParent(axTeWnd.Handle, IntPtr.Zero);
           
           
            axTe3DWindow.Focus(); //axTeDWindow是我需要全屏的窗體控件
            Application3D.CurrentSystemState.onKeyboardMessage = OnKeyDown;
}
        
//按下Wsc鍵取消全屏
 private void OnKeyDown(object sender, _ITE3DWindowEvents_OnKeyboardMessageEvent e)
        {          
            if (e.keyCode == 27)
            {
                //SenceContrl.NormalForm();
                WindowFullScreenApi.SetParent(axTe3DWindow.Handle, axTe3DWindow.Parent.Handle);
                axTe3DWindow.OnKeyboardMessage -= OnKeyDown;
                axTe3DWindow.Dock = DockStyle.Fill;
                WindowFullScreenApi.HideTask(false);
            }
        }   

winfrom實現控件全屏效果