c# - 在 Windows 7 中隐藏桌面项目 - 不工作

Question

在上一个问题中，有一个解释如何隐藏桌面项目:

How to hide desktop icons programatically?

出于某种原因，这段代码对我不起作用。

我本来可以简单地评论上面的链接，但我没有足够的权限评论其他人的问题...

知道出了什么问题吗？桌面根本不会隐藏。

更新:此外，我尝试使用以下代码(建议 here )，但仍然没有效果:

struct SHELLSTATE
{
      bool fShowAllObjects;
      bool fShowExtensions;
      bool fNoConfirmRecycle;
      bool fShowSysFiles;
      bool fShowCompColor;
      bool fDoubleClickInWebView;
      bool fDesktopHTML;
      bool fWin95Classic;
      bool fDontPrettyPath;
      bool fShowAttribCol;
      bool fMapNetDrvBtn;
      bool fShowInfoTip1;
      bool fHideIcons1;
      bool fWebView1;
      bool fFilter1;
      bool fShowSuperHidden1;
      bool fNoNetCrawling1;
      UInt32 dwWin95Unused;
      uint uWin95Unused;
      long lParamSort;
      int   iSortDirection;
      uint version;
      uint uNotUsed;
      bool fSepProcess;
      bool fStartPanelOn;
      bool fShowStartPage;
      bool fAutoCheckSelect;
      bool fIconsOnly;
      bool fShowTypeOverlay;
      uint fSpareFlags;
}

class MyClass
{
    const UInt32 SSF_HIDEICONS = 0x00004000;

    [DllImport("Shell32.dll")]
    static extern void SHGetSetSettings(ref SHELLSTATE state, UInt32 dwMask, bool bSet);
    static void Foobar()
    {
        SHELLSTATE stateOfMind = new SHELLSTATE();
        Console.WriteLine("Set to true:");
        SHGetSetSettings(ref stateOfMind, SSF_HIDEICONS, true);
        Console.ReadKey();
        Console.WriteLine("Set to false:");
        SHGetSetSettings(ref stateOfMind, SSF_HIDEICONAS, false);
        Console.ReadKey();
    }
}

Answer 1

这是 C# 中的示例代码，可以切换桌面图标。

[DllImport("user32.dll", SetLastError = true)] static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll", SetLastError = true)] static extern IntPtr GetWindow(IntPtr hWnd, GetWindow_Cmd uCmd);
enum GetWindow_Cmd : uint
{
    GW_HWNDFIRST = 0,
    GW_HWNDLAST = 1,
    GW_HWNDNEXT = 2,
    GW_HWNDPREV = 3,
    GW_OWNER = 4,
    GW_CHILD = 5,
    GW_ENABLEDPOPUP = 6
}
[DllImport("user32.dll", CharSet = CharSet.Auto)] static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

private const int WM_COMMAND = 0x111;

static void ToggleDesktopIcons()
{
    var toggleDesktopCommand = new IntPtr(0x7402);
    IntPtr hWnd = GetWindow(FindWindow("Progman", "Program Manager"), GetWindow_Cmd.GW_CHILD);
    SendMessage(hWnd, WM_COMMAND, toggleDesktopCommand, IntPtr.Zero);
}

这会向 Progman 的 SHELLDLL_DefView 子窗口发送一条消息，告诉它切换它唯一的子窗口“FolderView”的可见性(通过添加或删除 WS_VISIBLE 样式)。 “FolderView”是包含图标的实际窗口。

要测试图标是否可见，您可以使用 GetWindowInfo 函数查询 WS_VISIBLE 样式，如下所示:

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("user32.dll", SetLastError = true)]
private static extern bool GetWindowInfo(IntPtr hwnd, ref WINDOWINFO pwi);

[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
    private int _Left;
    private int _Top;
    private int _Right;
    private int _Bottom;
}

[StructLayout(LayoutKind.Sequential)]
struct WINDOWINFO
{
    public uint cbSize;
    public RECT rcWindow;
    public RECT rcClient;
    public uint dwStyle;
    public uint dwExStyle;
    public uint dwWindowStatus;
    public uint cxWindowBorders;
    public uint cyWindowBorders;
    public ushort atomWindowType;
    public ushort wCreatorVersion;

    public WINDOWINFO(Boolean? filler)
        : this()   // Allows automatic initialization of "cbSize" with "new WINDOWINFO(null/true/false)".
    {
        cbSize = (UInt32)(Marshal.SizeOf(typeof(WINDOWINFO)));
    }

}

这是一个函数，它调用上面的代码，如果窗口可见则返回 true，否则返回 false。

static bool IsVisible()
{
    IntPtr hWnd = GetWindow(GetWindow(FindWindow("Progman", "Program Manager"), GetWindow_Cmd.GW_CHILD), GetWindow_Cmd.GW_CHILD);
    WINDOWINFO info = new WINDOWINFO();
    info.cbSize = (uint)Marshal.SizeOf(info);
    GetWindowInfo(hWnd, ref info);
    return (info.dwStyle & 0x10000000) == 0x10000000;
}

可以在此处找到 Windows API 代码以及有关窗口样式的更多信息:http://www.pinvoke.net/default.aspx/user32/GetWindowInfo.html