Programming Forums > Application Development > Visual Basic

ReubenK · Mar 26th, 2006, 6:01 AM

Ok, To the point,
Is there any way I can disable CTRL - ALT - DEL in my program?
So when the program is running you cannot use CTRL - ALT - DEL on it?
Thanks,
Reuben Keeney

grumpy · Mar 26th, 2006, 6:47 AM

The three finger salute is part of the windows security mechanism, so disabling it is not recommended (as it leaves a security hole, which malicious programs can exploit). There comes a point where you have to trust your users when you give an instruction "Do not terminate this program".

jayme · Mar 26th, 2006, 9:42 AM

You can disable it within the windows registry. Good luck.

jeffball55 · Mar 26th, 2006, 9:37 PM

As already stated, its dangerous but it can be done. I made a program to mess with people that did this. Great for being annoying but no real purpose. Anyway, i got it to work on windows 98 but on 2000 it didn't work.

(Toggle Plain Text)

Public Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByVal lpvParam As Long, ByVal fuWinIni As Long) As Long
'Declare this windows api

'code to disable it
SystemParametersInfo(97, true, CStr(1), 0)

'code to enable it
SystemParametersInfo(97, false, CStr(1), 0)

Again this may not work, but thought i would tell you about it.

tayspen · Mar 26th, 2006, 9:49 PM

Have a look here.

http://www.vbforums.com/showthread.php?t=340597

Sane · Mar 26th, 2006, 9:54 PM

If you can't get that to work, you can always make a second executable that makes sure the first is always running. The user would have to systematically task kill both at the same time with their own script.

jayme · Mar 26th, 2006, 10:57 PM

You could also use dll injection, but that would probably be a little difficult for you. It's a nice thing to read up on though, neat process.

ReubenK · Mar 27th, 2006, 10:10 AM

yeah,thanks for the quick response as usual..
Thanks again!
You all have been great help
Reuben Keeney

Booooze · Mar 31st, 2006, 12:37 AM

People always seem to do this the hard way

. I've always found that if you don't want people to see the task manager, then all you have to do is have a timer set to look for the window. If it finds it close it. it can be done with the FindWindow API, and one other which i can't remember. It essentially gives the same results, and it's much easier.

Mjordan2nd · Mar 31st, 2006, 3:01 PM

I don't know VB, but couldn't you simply have a local hook or something?

Mar 26th, 2006, 6:01 AM	#1
ReubenK Programmer Join Date: Mar 2006 Posts: 36 Rep Power: 0	CTRL - ALT - DEL Question in VB Ok, To the point, Is there any way I can disable CTRL - ALT - DEL in my program? So when the program is running you cannot use CTRL - ALT - DEL on it? Thanks, Reuben Keeney

Mar 26th, 2006, 9:37 PM	#4
jeffball55 Newbie Join Date: Mar 2006 Location: USA Posts: 9 Rep Power: 0	As already stated, its dangerous but it can be done. I made a program to mess with people that did this. Great for being annoying but no real purpose. Anyway, i got it to work on windows 98 but on 2000 it didn't work. (Toggle Plain Text) Public Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByVal lpvParam As Long, ByVal fuWinIni As Long) As Long 'Declare this windows api 'code to disable it SystemParametersInfo(97, true, CStr(1), 0) 'code to enable it SystemParametersInfo(97, false, CStr(1), 0) Public Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByVal lpvParam As Long, ByVal fuWinIni As Long) As Long 'Declare this windows api 'code to disable it SystemParametersInfo(97, true, CStr(1), 0) 'code to enable it SystemParametersInfo(97, false, CStr(1), 0) Again this may not work, but thought i would tell you about it.

Mar 26th, 2006, 9:49 PM	#5
tayspen Hobbyist Programmer Join Date: Sep 2005 Location: A House... Posts: 191 Rep Power: 4	Have a look here. http://www.vbforums.com/showthread.php?t=340597 __________________ ManagePod, an iPod Management tool. - Forums Gaming Forums. Tough Admin

Mar 31st, 2006, 3:01 PM	#10
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	I don't know VB, but couldn't you simply have a local hook or something? __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

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Mar 26th, 2006, 6:47 AM	#2
grumpy Programming Guru Join Date: Jun 2005 Location: Adelaide, South Australia Posts: 1,223 Rep Power: 5	The three finger salute is part of the windows security mechanism, so disabling it is not recommended (as it leaves a security hole, which malicious programs can exploit). There comes a point where you have to trust your users when you give an instruction "Do not terminate this program".

Mar 26th, 2006, 9:54 PM	#6
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,885 Rep Power: 5	If you can't get that to work, you can always make a second executable that makes sure the first is always running. The user would have to systematically task kill both at the same time with their own script.

Mar 27th, 2006, 10:10 AM	#8
ReubenK Programmer Join Date: Mar 2006 Posts: 36 Rep Power: 0	yeah,thanks for the quick response as usual.. Thanks again! You all have been great help Reuben Keeney

Mar 31st, 2006, 12:37 AM	#9
Booooze Expert Programmer Join Date: Mar 2006 Location: Igloo Posts: 710 Rep Power: 3	People always seem to do this the hard way . I've always found that if you don't want people to see the task manager, then all you have to do is have a timer set to look for the window. If it finds it close it. it can be done with the FindWindow API, and one other which i can't remember. It essentially gives the same results, and it's much easier.

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Programming Forums > Application Development > Visual Basic

CTRL - ALT - DEL Question in VB