C#从任务栏隐藏应用程序 [英] C# Hiding an application from the taskbar

问题描述

我一直在努力从应用程序的任务栏中隐藏另一个应用程序.
我一直在使用 SetWindowLong 函数，以便在扩展样式.

I have been struggling to hide another application from the taskbar from my application.
I have been using the SetWindowLong function in order to set/remove WS_EX_APPWINDOW on the extended style.

我已经尝试过分别设置和删除该属性，以及尝试获取当前的WindowLong并将其删除/添加到该属性，就像这样:

I have tried both setting and removing the property individually as well as taking the current WindowLong, and removing/adding it to that one, like so:

SetWindowLong(pMainWindow, GWL_EXSTYLE, GetWindowLong(pMainWindow) & WS_EX_APPWINDOW);

并尝试将其删除，如下所示:

And tried removing it like so:

SetWindowLong(pMainWindow, GWL_EXSTYLE, GetWindowLong(pMainWindow) & ~WS_EX_APPWINDOW);

还尝试了这两种方法，而没有先让窗口变长.这是我的整个代码:

Also tried both those methods without first getting the window long. Here is my entire code:

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    [DllImport("User32.dll")]
    public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
    [DllImport("User32.dll")]
    public static extern int GetWindowLong(IntPtr hWnd, int nIndex);

    [DllImport("user32.dll")]
    static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

    private const int SW_HIDE = 0x00;
    private const int SW_SHOW = 0x05;

    private const int WS_EX_APPWINDOW = 0x40000;
    private const int GWL_EXSTYLE = -0x14;

    private void HideWindowFromTaskbar(IntPtr pMainWindow)
    {
        SetWindowLong(pMainWindow, GWL_EXSTYLE, ~WS_EX_APPWINDOW);

        ShowWindow(pMainWindow, SW_HIDE);
        ShowWindow(pMainWindow, SW_SHOW);
    }

    private void ButtonHide_Click(object sender, RoutedEventArgs e)
    {
        HideWindowFromTaskbar(Process.GetProcessesByName("notepad")[0].MainWindowHandle);
    }
}

我注意到Spy ++中的属性发生了变化.我得到了一堆不同的结果，例如添加了WS_EX_APPWINDOW，但是其他属性随机消失了，等等.
在查看邮件时，我还看到它直接收到了STYLE_CHANGED之类的邮件.

I have noticed changes in Spy++ looking at the properties. I had a bunch of different results, like WS_EX_APPWINDOW being added, but also randomly have other attributes disappearing, etc.
When looking at the messages, I also saw that it DID get messages like STYLE_CHANGED.

任何帮助将不胜感激，
雷内(René)

Any help would be appreciated,
René

推荐答案

摘要 :

The rules for determining which windows have buttons on the taskbar are documented on MSDN. Raymond Chen gives the following summary of these rules:

窗口进入任务栏有一些基本规则.在 简短:

There are some basic rules on which windows go into the taskbar. In short:

• 如果设置了WS_EX_APPWINDOW扩展样式，则它将显示(可见时).
• 如果该窗口是顶级无主窗口，则它将显示(可见时).
• 否则它不会显示.

• If the WS_EX_APPWINDOW extended style is set, then it will show (when visible).
• If the window is a top-level unowned window, then it will show (when visible).
• Otherwise it doesn't show.

您试图在另一个应用程序中修改窗口的事实严重影响了您.您正在删除WS_EX_APPWINDOW扩展样式.这还不够，因为所讨论的窗口将是顶级的无主窗口(请参见项目符号要点2).创建窗口后，您将无法更改其所有者，并且由于该窗口是由另一个进程控制的，因此您几乎陷入了僵局.

The fact that you are trying to modify a window in another app severely hampers you. You are removing the WS_EX_APPWINDOW extended style. This is not enough because the window in question will be a top-level unowned window (see bullet point 2). You cannot change the owner of a window once it has been created and since the window is controlled by another process you are pretty much stuck.

剩下的唯一选择是删除WS_EX_APPWINDOW扩展样式并将其替换为WS_EX_TOOLWINDOW.实际上，这将使该窗口脱离任务栏，但它将更改

The only option remaining is to remove the WS_EX_APPWINDOW extended style and replace it with WS_EX_TOOLWINDOW. This will indeed get the window off the taskbar but it will change the appearance of the window:

该窗口旨在用作浮动工具栏.工具窗口 标题栏比普通标题栏短，并且 窗口标题是使用较小的字体绘制的.工具窗口不 出现在任务栏或用户出现时出现的对话框中 按ALT + TAB.如果工具窗口具有系统菜单，则其图标不是 显示在标题栏上.但是，您可以显示系统菜单 通过右键单击或键入ALT + SPACE.

The window is intended to be used as a floating toolbar. A tool window has a title bar that is shorter than a normal title bar, and the window title is drawn using a smaller font. A tool window does not appear in the taskbar or in the dialog that appears when the user presses ALT+TAB. If a tool window has a system menu, its icon is not displayed on the title bar. However, you can display the system menu by right-clicking or by typing ALT+SPACE.

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