//在alt+tab中隐藏protected override CreateParams CreateParams{    get    {        const int WS_EX_APPWINDOW = 0x40000;        const int WS_EX_TOOLWINDOW = 0x80;        CreateParams cp = base.CreateParams;        cp.ExStyle &= (~WS_EX_APPWINDOW);        cp.ExStyle |= WS_EX_TOOLWINDOW;        return cp;    }}private IntPtr programIntPtr = IntPtr.Zero;private void Find(){    // 通过类名查找一个窗口，返回窗口句柄。    programIntPtr = Win32.FindWindow("Progman", null);}private void Init(){    // 窗口句柄有效    if (programIntPtr != IntPtr.Zero)    {        IntPtr result = IntPtr.Zero;        // 向 Program Manager 窗口发送 0x52c 的一个消息，超时设置为0x3e8（1秒）。        Win32.SendMessageTimeout(programIntPtr, 0x52c, IntPtr.Zero, IntPtr.Zero, 0, 0x3e8, result);        // 遍历顶级窗口        Win32.EnumWindows((hwnd, lParam) =>        {            // 找到包含 SHELLDLL_DefView 这个窗口句柄的 WorkerW            if (Win32.FindWindowEx(hwnd, IntPtr.Zero, "SHELLDLL_DefView", null) != IntPtr.Zero)            {                // 找到当前 WorkerW 窗口的，后一个 WorkerW 窗口。                IntPtr tempHwnd = Win32.FindWindowEx(IntPtr.Zero, hwnd, "WorkerW", null);                // 隐藏这个窗口                Win32.ShowWindow(tempHwnd, 0);            }            return true;        }, IntPtr.Zero);        // 窗口置父，设置背景窗口的父窗口为 Program Manager 窗口        Win32.SetParent(this.Handle, programIntPtr);    }}private void OnLoad(object sender, EventArgs e){    this.Dock = DockStyle.Fill;    this.ShowInTaskbar = false;    this.FormBorderStyle = FormBorderStyle.None;        Rectangle bound = Screen.PrimaryScreen.Bounds;    this.Width = bound.Width;    this.Height = bound.Height;    this.Left = 0;    this.Top = 0;    Find();    Init();        this.WindowState = FormWindowState.Maximized;    IntPtr oldprogramIntPtr = programIntPtr;    new Thread(() =>    {        while (true)        {            Find();            //当资源管理器重启后，程序自动重启            if (programIntPtr != oldprogramIntPtr)            {                Application.ExitThread();                Application.Exit();                Application.Restart();                Process.GetCurrentProcess().Kill();            }                        //某些原因下，桌面窗口的子窗口会失效，比如按下 win+tab            //我们查找一下桌面窗口的子窗口，找不到当前壁纸程序的句柄，那就重新设置一下            bool hasChild = false;            Win32.EnumChildWindows(programIntPtr, (IntPtr hwnd, IntPtr lParam) =>            {                hasChild |= hwnd == this.Handle;                return true;            }, IntPtr.Zero);            if (hasChild == false)            {                Init();            }                        Thread.Sleep(1000);        }    }).Start();}public static class Win32{    [DllImport("user32.dll")]    public static extern bool EnumChildWindows(IntPtr hWndParent, EnumChildCallback lpEnumFunc, IntPtr lParam);    public delegate bool EnumChildCallback(IntPtr hwnd, IntPtr lParam);        [DllImport("user32.dll")]    public static extern IntPtr FindWindow(string className, string winName);    [DllImport("user32.dll")]    public static extern IntPtr SendMessageTimeout(IntPtr hwnd, uint msg, IntPtr wParam, IntPtr lParam, uint fuFlage, uint timeout, IntPtr result);    [DllImport("user32.dll")]    public static extern bool EnumWindows(EnumWindowsProc proc, IntPtr lParam);    public delegate bool EnumWindowsProc(IntPtr hwnd, IntPtr lParam);    [DllImport("user32.dll")]    public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string className, string winName);    [DllImport("user32.dll")]    public static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);    [DllImport("user32.dll")]    public static extern IntPtr SetParent(IntPtr hwnd, IntPtr parentHwnd);}