Disabling Windows Close Button

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Felix Honda

2 discussion posts

Hello, just wondering if there was a way to disable the windows close button (X) in the upper right corner of a window similar to Actual Window Manager? Trying to find a way to prevent specific programs from accidentally closing. Thanks!

Jul 5, 2018 • #1

There is a terrific free little app that can do this for you called NoClose
Read More/Download Here:
http://www.dcmembers.com/skrommel/download/noclose/

Jul 6, 2018 • #2

Searching in Google and PInvoke.net i was able to find a simple solution. Create trigger on the desired application (window created, focus, or what else) and use the following script as an action. I hope from the code it is clear that you can both disable and enable the button, just commenting\uncommenting the desired line in the code.

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using System;
using System.Drawing;
using System.Runtime.InteropServices;

public static class DisplayFusionFunction
{
    [DllImport("user32.dll")] private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
    [DllImport("user32.dll")] private static extern int EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);
    
    private const uint Close = 0xF060;
    private const uint Enabled = 0x00000000;
    private const uint Disabled = 0x00000002;

    public static void Run(IntPtr windowHandle)
    {
        EnableMenuItem(GetSystemMenu(windowHandle, false), Close, Disabled);
        // EnableMenuItem(GetSystemMenu(windowHandle, false), Close, Enabled);
    }
}

Jul 7, 2018 • #3

Felix Honda

2 discussion posts

Quote:

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using System;
using System.Drawing;
using System.Runtime.InteropServices;

public static class DisplayFusionFunction
{
    [DllImport("user32.dll")] private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
    [DllImport("user32.dll")] private static extern int EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);
    
    private const uint Close = 0xF060;
    private const uint Enabled = 0x00000000;
    private const uint Disabled = 0x00000002;

    public static void Run(IntPtr windowHandle)
    {
        EnableMenuItem(GetSystemMenu(windowHandle, false), Close, Disabled);
        // EnableMenuItem(GetSystemMenu(windowHandle, false), Close, Enabled);
    }
}

Brilliant! Script works perfectly! Thanks!

Jul 7, 2018 • #4

I think it's not always convenient to use triggers. And a little bit changed the script to use it with hot keys. Works as a switch, with a single hotkey.

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using System;
using System.Drawing;
using System.Runtime.InteropServices;

public static class DisplayFusionFunction
{
    [DllImport("user32.dll")]
    private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
    [DllImport("user32.dll")]
    private static extern int EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);
    
    private const uint CloseButton = 0xF060;
    private const uint Enabled = 0x00000000;
    private const uint Disabled = 0x00000002;

    public static void Run(IntPtr windowHandle)
    {
        if(!BFS.ScriptSettings.ReadValueBool("CloseButtonState"))
        {
            EnableMenuItem(GetSystemMenu(windowHandle, false), CloseButton, Enabled);
            BFS.ScriptSettings.WriteValueBool("CloseButtonState", true);
        }
        else
        {
            EnableMenuItem(GetSystemMenu(windowHandle, false), CloseButton, Disabled);
            BFS.ScriptSettings.WriteValueBool("CloseButtonState", false);
        }
    }
}

Jul 9, 2018 • #5