how to disable ctrl+Alt+del and windows buttton using C# with wpf ?

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I am tring to disable ctrl+Alt+del and windows buttton using C# with wpf

my program will traget Windows 7 and windows 8 .

Posted 25-Jan-14 3:25am

osamaworx

Updated 10-Mar-18 5:18am

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Comments

karthik Udhayakumar 25-Jan-14 9:34am

Hello,

Try this code

protected override void OnKeyDown(KeyEventArgs e)
{
if (Keyboard.Modifiers == ModifierKeys.Alt && e.SystemKey == Key.F4 ||
Keyboard.Modifiers == ModifierKeys.Control && e.SystemKey == Key.Escape)
{
e.Handled = true;
}
else
{
base.OnKeyDown(e);
}
}

osamaworx 25-Jan-14 9:41am

thanks for attention , but unfortionately It dosent work !

2 solutions

Solution 2

The code in the other solution only disables TaskManager. It does NOT disable Ctrl-Alt-Del. That key combination can NOT be disabled.

The Window key can only be disabled by writing a global keyboard hook and just not passing that key up the hook chain when your code sees it.

Also, if you're trying to stop people from stopping processes, the registry hack you were given in Solution 1 only prevent TaskManager from running. It will not stop other utilities from being used to do the exact same thing, like TaskList and TaskKill.

Posted 25-Jan-14 5:40am

Dave Kreskowiak

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sampath Lokuge · Accepted Answer · 2014-01-25T03:30:00

Solution 1

Please check below link.It may be helped to you.

How to Disable CTRL+ALT+DEL Key

Another Link : Possible to disable Control-Alt-Delete buttons

Here is the c# code

C#

private void DisableTaskManager()
{
    RegistryKey regkey = default(RegistryKey);
    string keyValueInt = "1";
    string subKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System";
    try {
        regkey = Registry.CurrentUser.CreateSubKey(subKey);
        regkey.SetValue("DisableTaskMgr", keyValueInt);
        regkey.Close();
    } catch (Exception ex) {
        Interaction.MsgBox(ex.Message, MsgBoxStyle.Critical, "Registry Error!");
    }

}

C#

private void EnableTaskManager()
{
    RegistryKey regkey = default(RegistryKey);
    string keyValueInt = "0";
    //0x00000000 (0)
    string subKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System";
    try {
        regkey = Registry.CurrentUser.CreateSubKey(subKey);
        regkey.SetValue("DisableTaskMgr", keyValueInt);
        regkey.Close();
    } catch (Exception ex) {
        Interaction.MsgBox(ex.Message, MsgBoxStyle.Critical, "Registry Error!");
    }

}

You can use This Free Tool to convert it: Convert VB.NET to C#

Posted 25-Jan-14 3:30am

Sampath Lokuge

Updated 25-Jan-14 3:47am

v3

Comments

osamaworx 25-Jan-14 9:43am

yes thank you , but I already read it but the script was writen by VB , I am not familiar with it , I need C# Script.

Sampath Lokuge 25-Jan-14 9:48am

I have updated my answer.Please check that.

Ron Beyer 25-Jan-14 9:52am

Unfortunately to run this code you will have to run the program with administrative permissions.

osamaworx 25-Jan-14 10:06am

First of all I am really thank you too mutch for yor help , and I will work on try this ways .

Sampath Lokuge 25-Jan-14 10:07am

OK sure.No problem :)

osamaworx 26-Jan-14 18:45pm

thanx too much it s working .. :)

Sampath Lokuge 27-Jan-14 1:54am

Thanks.Glad to hear it! Best of luck. :)

tlhIn`toq 25-May-15 10:53am

25may2015 - Solution 1: Disable/enable task manager - Does not seem to work in Windows 10. MS probably overhauled the task manager, or moved the location for system policies registry value.

LePixeL 18-Oct-15 17:02pm

It works fine on windows 10..
Although setting the DisableTaskMgr back to 0 doesnt work
I just delete the key when I am done.
private void EnableTaskManager()
{
RegistryKey regkey = default(RegistryKey);
string subKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System";
try
{
regkey = Registry.CurrentUser.CreateSubKey(subKey);
regkey.DeleteValue("DisableTaskMgr");
regkey.Close();
//MessageBox.Show("EnabledTaskMAnager");
}
catch (Exception ex)
{
MessageBox.Show("Registry Error!");
}

}

Member 12923287 4-Jan-17 2:25am

this is working in usermode??

how to disable ctrl+Alt+del and windows buttton using C# with wpf ?

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how to disable ctrl+Alt+del and windows buttton using C# with wpf ?

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