Stop windows from showing up as 'tasks' from task manager WPF c#

Question

I have a program that opens multiple windows. I have used this method to hide them from ALT+TAB. Now I need the new windows to stop showing up in the 'tasks' tab of task manager.

I don't need the process not to show up in task manager, I just don't want all the windows my program opens to show up in the 'task' tab.

Here is a picture of what I'm trying to get rid of: http://i1096.photobucket.com/albums/g324/thezaza101/Tasklist.jpg

-Thanks

how are you opening the new Windows from the main one? Are you running multiple processes or only one? — Davide Piras, Sep 24 '11 at 13:13
Main window opens the windows i need to hide in task manager, @ BalamBalam They just run passively, its like a 'post it' program, — zaza, Sep 24 '11 at 14:24
@David Heffernan I have used the .Hide() method on the main window. @ Henk Holterman it still shows in task manager — zaza, Sep 24 '11 at 14:28
You need to make the other windows owned by the main window in Win32 terms. No idea how to do that in WPF mind you! — David Heffernan, Sep 24 '11 at 14:30
@David Heffernan thanks that helped a lot, I'll answer my question for everyone to see! — zaza, Sep 25 '11 at 00:31

score 8 · Accepted Answer · answered Sep 25 '11 at 00:39

8

Solved thanks to David Heffernan.

On my main window i added a static window field which references my main window.

public static Window main;
Public MainWindow()
{
main = this;
}

On the windows I need to hide from task manager and ALT+TAB, I made my main window its owner:

public HiddenWindow()
{
this.Owner = MainWindow.main;
}

Its really simple, it hides the window from the 'tasks' tab on task manager and also stop people from ALT+TABing into your program.

answered Sep 25 '11 at 00:39

zaza

892
1
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This solution work perfectly. instead of type of 'window' , I use 'From'. It work like a charm!! – morteza karimian kelishadrokhi Feb 20 '21 at 21:26

score 4 · Answer 2 · answered Jul 31 '18 at 09:11

Another way is to use WindowInteropHelper.

    public MainWindow()
    {
        InitializeComponent();

        SourceInitialized += (s, e) =>
        {
            var win = new WindowInteropHelper(this);
            win.Owner = GetDesktopWindow();
        };
    }

    [DllImport("user32.dll", SetLastError = false)]
    static extern IntPtr GetDesktopWindow();

David Anderson · Answer 3 · 2011-09-24T13:58:38.133

4

For WPF the only way I currently know of is to set your window's title to string.Empty or set WindowStyle to ToolWindow. Setting ShowInTaskBar to false does not hide your window from the applications list.

edited Sep 24 '11 at 13:58

answered Sep 24 '11 at 13:40

David Anderson

13,558
5
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That's a Winforms answer to a WPF question. – Hans Passant Sep 24 '11 at 13:54
My bad, extremely tired and assumed. Thanks for pointing that out; I updated my answer. – David Anderson Sep 24 '11 at 13:59

score 0 · Answer 4 · answered Jun 26 '15 at 14:17

0

I hvae the same problem(may some different), here is my code:

subWindow.hide();//this will hide the subWindow
subWindow.show();//if want to show again

you will not see window in task or AlT+TAB after use hide()

answered Jun 26 '15 at 14:17

chengzi

170
2
10

Stop windows from showing up as 'tasks' from task manager WPF c#

4 Answers4

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