Blockinput_() problem

Matt · Post by **Matt** » Fri Feb 02, 2007 11:39 pm

If I use Blockinput_(1) to disable the mouse and keyboard, the user will still be able to gain back control over the mouse and keyboard by pressing Control-Alt-Delete... is there anyway I can stop that?

Bonne_den_kule · Post by **Bonne_den_kule** » Fri Feb 02, 2007 11:59 pm

Not on XP or 2000 without any "hacks" I think...

ts-soft · Post by **ts-soft** » Sat Feb 03, 2007 12:43 am

this is good.
If Control-Alt-Delete doesn't work, i would put power off, put on and recycle the software

Matt · Post by **Matt** » Sat Feb 03, 2007 12:45 am

We'll actually I need it. I am making a 'vnc' type program, where you can control a client's computer, and one of the options I need is to lock all mouse and keyboard input.

ts-soft · Post by **ts-soft** » Sat Feb 03, 2007 12:48 am

then remove the keyboard

Matt · Post by **Matt** » Sat Feb 03, 2007 1:04 am

oh come on...

rsts · Post by **rsts** » Sat Feb 03, 2007 6:06 am

If the client wants their computer controlled, they will usually agree not to use the keyboard. The vnc programs I've used didn't lock me out of the computer if I wanted in - and that's pretty much the way I feel it should be.

Why do you feel they should be locked out of ctl/alt/delete?

cheers

Kaeru Gaman · Post by **Kaeru Gaman** » Sat Feb 03, 2007 12:05 pm

only bloody virus-programmers need such crap.

PB · Post by PB » Sat Feb 03, 2007 12:12 pm

> only bloody virus-programmers need such crap

Let's not judge, FFS. Anyone can do what they want for an app. If he wants
to block input for his app, who are we to tell him no? Are we his daddy? He
never said the app was for public use -- it might be a private custom app for
all we know. Let's just stop with the judging over such a small thing. It's not
like he asked how to delete the Windows folder! The BlockInput API is made
by Microsoft for legitimate uses, so let him use it how he wants. Sheesh.

Kaeru Gaman · Post by **Kaeru Gaman** » Sat Feb 03, 2007 12:16 pm

yo ok, mate, you're right.

...it's just that the tiny hairs in my neck rise when I hear such questions...

PB · Post by PB » Sat Feb 03, 2007 12:32 pm

I know what you mean, but he's using a normal documented API call, so it's
no big deal, in my opinion. I didn't mean to sound harsh but I hate it when
someone doesn't get help just because others assume it's for malicious intent.

Now, if he had asked how to use DeleteFile_() with GetSystemDirectory_() then
of course we would be very hesitant to help, but blocking input isn't such a big
problem. As the documentation says: if the process that made the block is killed,
then full normal input returns automatically, so all the user has to do is press
CTRL+ALT+DEL and kill the process, and bang, all systems normal again.

Kaeru Gaman · Post by **Kaeru Gaman** » Sat Feb 03, 2007 2:53 pm

correct. that's the reason why Ctrl-Alt-Del is not blockable,
but that was what he was asking for.

not simple input-blocking, but blocking Ctrl-Alt-Del.....

Matt · Post by **Matt** » Sat Feb 03, 2007 6:28 pm

I am making a vnc-type program, but not exactly. It's for personal use in my house over my computers really. What I needed was something to stop all input on the users side, so they would not be able to interfere with anything that the controller person is doing.

rsts · Post by **rsts** » Sat Feb 03, 2007 7:42 pm

Well, if it's your kids, you ought to be able to tell them to say off while you do your thing.

If it's your wife, you might have to try "honey, would you please. . ."

I still see no valid case for trapping ctl/alt/delete - but it's your place, so the remove the keyboard ought to be a valid option too.

good luck

Matt · Post by **Matt** » Sat Feb 03, 2007 7:50 pm

thanks

I plan on just leaving it then, blockinput will work for me I guess,

thanks everyone.

Matt