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 1     /// <summary>設(shè)置窗口位置</summary>
 2     /// <param name="hwnd">窗口句柄</param>
 3     /// <param name="hWndInsertAfter">跟隨的窗口句柄</param>
 4     /// <param name="x">X軸坐標(biāo)</param>
 5     /// <param name="y">Y軸坐標(biāo)</param>
 6     /// <param name="width">寬</param>
 7     /// <param name="height">高</param>
 8     /// <param name="uFlags">標(biāo)志位</param>
 9     /// <returns></returns>
10     [DllImport("user32.dll", SetLastError = true)]
11     public static extern bool SetWindowPos(IntPtr hwnd, IntPtr hWndInsertAfter, int x, int y, int width, int height, uint uFlags);

 1     private nint _handle;
 2     private void MainWindow_Loaded(object sender, RoutedEventArgs e)
 3     {
 4         _handle = new WindowInteropHelper(this).Handle;
 5         SetWindowPos(_handle, -1, 0, 0, 0, 0, 1);
 6         //定時器置頂
 7         var timer = new Timer();
 8         timer.Interval = 100;
 9         timer.Elapsed += Timer_Elapsed;
10         timer.Start();
11     }
12     private void Timer_Elapsed(object? sender, System.Timers.ElapsedEventArgs e)
13     {
14         SetWindowPos(_handle, -1, 0, 0, 0, 0, 1);
15     }

 1     public MainWindow()
 2     {
 3         InitializeComponent();
 4         //當(dāng)前登錄的用戶變化
 5         SystemEvents.SessionSwitch += SystemEvents_SessionSwitch;
 6     }
 7     private void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e)
 8     {
 9         switch (e.Reason)
10         {
11             //解鎖屏
12             case SessionSwitchReason.SessionUnlock:
13                 Topmost = true;
14                 break;
15             //鎖屏
16             case SessionSwitchReason.SessionLock:
17                 Topmost = false;
18                 break;
19         }
20     }

1     int exStyle = GetWindowLong(hWnd, GWL_EXSTYLE);
2     // 設(shè)置窗口樣式為工具窗口, 不在任務(wù)欄顯示
3     exStyle |= WS_EX_TOOLWINDOW;
4     SetWindowLong(hWnd, GWL_EXSTYLE, exStyle);
5     //二次設(shè)置任務(wù)欄不顯示
6     ShowInTaskbar = false;

 1     public void SetTopmost()
 2     {
 3         IntPtr hWnd = _hWnd;
 4         // 將窗口設(shè)置為頂層窗口
 5         Topmost = true;
 6 
 7         int exStyle = GetWindowLong(hWnd, GWL_EXSTYLE);
 8         // 設(shè)置窗口樣式為工具窗口, 不在任務(wù)欄顯示
 9         exStyle |= WS_EX_TOOLWINDOW;
10         SetWindowLong(hWnd, GWL_EXSTYLE, exStyle);
11         //二次設(shè)置任務(wù)欄不顯示
12         ShowInTaskbar = false;
13     }