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Disabling Alt-F4 on a Win Forms NotifyIcon

Answer 1

A:

Femaref 2010-06-17 16:18:19

sorry, this doesn't work. The main window gets no events when I press keys after opening the context menu of my systrayicon.

Jippers 2010-06-17 17:19:04

Answer 2

A:

Well, I gotta say that was a tricky one, but after some quick testing, I think this will do.

    private void Form1_Load(object sender, EventArgs e)
    {
        this.Activated += new EventHandler(Form1_Activated);
    }

    void Form1_Activated(object sender, EventArgs e)
    {
        string iconPath = "some file system path";
        notifyIcon1.Icon = new Icon(iconPath);
    }

It won't make it so thay you can't make the icon dissappear, but at least when your application get focus, the icon will retrun.

You might also try storing the icon so that you do not need to keep constructing it.

Seattle Leonard 2010-06-17 16:40:00

this might work as a work around, except in the instance of my bug where if the user does the "Minimize to systray" and then closes the systrayicon. There's no way to bring the mainwindow back for the restore icon to work.

Jippers 2010-06-17 17:20:39

you're right. However, you could minimize this a bit further by adding the restore icon logic in the "minimize to Sys Tray" event.Further, you could add a timer when the application is minimized and ,every 30 sec or so, just go ahead and reset the icon. This will consume more resources, but it will get the job done.

Seattle Leonard 2010-06-17 21:24:01

Other than that, about the only thing you can do is to put into your documentation that if someone actually does run into this edge case, that they must launch the task manager and click "switch to".

Seattle Leonard 2010-06-17 22:31:23

There may be some whay to tap into the Windows API to get the results you want.

Seattle Leonard 2010-06-18 00:39:04

Switch To doesn't work because when minimized to systray it's not showing up in the applications list. I'm thinking windows API might be my only solution but for now it's a me sandwich with rock and hardplace bread.

Jippers 2010-06-18 18:24:25

Answer 3

A:

So this is a bug and I've reported it to Microsoft Connect. Check here for updates I suppose: https://connect.microsoft.com/VisualStudio/feedback/details/568590/unable-to-disable-alt-f4-on-winforms-notifyicon-when-context-menu-is-open?wa=wsignin1.0

Jippers 2010-07-27 17:57:16

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Disabling Alt-F4 on a Win Forms NotifyIcon

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