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DarkBASIC Professional Discussion / Disable Ctrl+Alt+Del

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Shady Simpson
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Posted: 3rd Apr 2003 18:47
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hi,

how can you disable Ctrl+Alt+Del when your program is running.

I'm trying to make like a sort of password checker. I've got all the programmin done, now the only problem is you can press Ctrl+Alt+Del and close it.

Please Help.
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MrTAToad
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Posted: 3rd Apr 2003 20:39
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No, you shouldn't try to block CTRL+ALT+DEL at all...

Good news everyone! I really am THAT good...
http://www.nickk.nildram.co.uk/ for great plug-ins - oh my, yes!
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Andy Igoe
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Posted: 3rd Apr 2003 21:46
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To logon like Win NT?

The only way to do that will be to get your program to access the keyboard before windows does - it's not exactly native when working under direct input. You will need to access the keyboard directly and if you can get that far, stopping windows from reading the keyboard will be easy.

DBPro isn't designed for this sort of direct hardware access, infact, it's specifically the opposite.

Pneumatic Dryll, Outrageous epic cleric of EQ/Xev
God made the world in 7 days, but we're still waiting for the patch.
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Shady Simpson
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Posted: 3rd Apr 2003 22:28
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what do you mean access the keyboard before windows does?
How Could I do that?

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MrTAToad
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Posted: 3rd Apr 2003 23:17
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You can hook the CTRL+ALT+DEL (with NT/2000 anyway), before Windows get to it. You shouldn't do it though.

Good news everyone! I really am THAT good...
http://www.nickk.nildram.co.uk/ for great plug-ins - oh my, yes!
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KamaKase
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Posted: 3rd Apr 2003 23:24
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The only way to avoid it in DBPro I could see, is to have a scancode for each of CTRL and ALT, then if they're pressed, make it run some code which doesn't work. Which will crash the comp. And make them restart.

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Andy Igoe
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Posted: 4th Apr 2003 00:36 Edited at: 4th Apr 2003 00:36
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Quote: "How Could I do that?"


DBPro is a directX programming language, therefor using Direct Input - which is higher level than Windows, therefor Windows will get to the keyboard first.

If you want to take direct control of the keyboard you will have to leave the realm of directX and DBPro.

Pneumatic Dryll, Outrageous epic cleric of EQ/Xev
God made the world in 7 days, but we're still waiting for the patch.
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cusoi
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Posted: 4th Apr 2003 00:40
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In Delphi it's pretty easy. I've done it many times before. I made some 'Operation systems'. They were just full screen windows applications that you couldn't quit with control alt delte or ctr+esc, etc. Just buy Delphi and download some components.

Pentium IV 2.4 GHZ 256 MB Ram Geforce 4 TI 4200 128 MB
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Rob K
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Posted: 4th Apr 2003 00:40
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DISABLE SYSTEMKEYS

- It works on Windows 98, but not on Windows XP.

Current Project: Retro Compo. Entry.
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the_winch
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Posted: 4th Apr 2003 00:55
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I hate programs that do that, Just because if something goes wrong I have to turn the computer off and on at the switch insted of just Ctrl+Alt+Del and closing the offending program.

Add to that messing with the users sytem without their permission is not very nice.

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Rob K
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Posted: 4th Apr 2003 01:18
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"Add to that messing with the users sytem without their permission is not very nice"

Surely they should just not run the program then?

Current Project: Retro Compo. Entry.
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Galiem
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Posted: 4th Apr 2003 01:57
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Yeah it's a bad idea to do that, just under general programming ethics. ctrl + alt + del is soemetimes the only way to end a program that has your PC making like a hamster in a wheel.

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Shady Simpson
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Posted: 4th Apr 2003 19:27
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Right, Thanx,

I'm still just experimenting and I didn't know it would cause so much trouble.

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malcom2073
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Posted: 4th Apr 2003 20:47
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Arent there any dll's that allow you to capture system events? I know directX cant, but with the help of a dll written in say.. c++ it might be able to right?

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MiniMark
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Posted: 5th Apr 2003 09:34
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If you can write a dll in visual basic there is an api call which can turn off ctrl alt delete and re-instate. Try some where like vbworld for the routine. It can be done.

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Rob K
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Posted: 5th Apr 2003 10:18
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Getting VB DLLs to work with DBP isn't easy as they aren't proper DLLs.

Current Project: Retro Compo. Entry.
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Eponick
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Posted: 5th Apr 2003 10:23 Edited at: 5th Apr 2003 10:23
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Shouldnt do it, Ctrl+Alt+Delete is on the computer for a reason. Like being able to quit a program if it stops respoding..

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