Disable ctrl + alt + delete

[holly]

Hi

Has anyone got a snippet of code that would disble the ctrl + alt +
del funtionality????

Pretty Please....

Thanks

[Dreamlax]

It is not possible to do this on Windows NT based platforms (this includes 2000 and XP). For Windows 98 you can use the SystemParametersInfo function and let your application imitate a screen saver, this disables system key-combinations such as Ctrl+Alt+Del and Alt+Tab etc.

[holly]

So there is not way of disabling ctrl+alt+del on a win 2000 OS....


Thanks

[Dreamlax]

Actually there is, but it's obviously undocumented and really hard to find out. How do I know?

Microsoft Virtual Machine 'emulates' (not particularly emulated but yuo get my drift) another Windows session, using the same PC, but in a window (or full screen). If you press Ctrl+Alt+Del within the VM session, instead of the unemulated Windows going to the "Windows Security" dialog box, it simply opens up a message box saying "Windows has detected you pushed Ctrl+Alt+Del. While using Windows VM, please use Ctrl+Alt+End instead."

I heard it has something to do with the msgina.dll, that handles Windows Logon.

[holly]

so it is possible? do you know how I may accomplish this?

What api will I have to use?

[Dreamlax]

It's possible, but I think only the programmers of Microsoft Virtual Machine and the authors of msgina.dll know how to do it.

It would defeat the entire purpose of Windows NT's security by releasing how to do it. I'm afraid you are stuck on this one, no amount of searching will get you any further. Also, the function won't have a name, it would be called by ordinal number, most likely, to prevent people trying to search for a function name within msgina.dll.

[holly]

Well it looks as though I'm stuck..... What a pain.....


Thanks for your help!!!

[Dreamlax]

Just out of curiosity, what kind of program do you intend to build, if it requires the disabling of Ctrl+Alt+Del?

[holly]

I have written an inventory system.....You do actually need a
pwd to close the application down but the problem is the user
keeps pressing the ctrl + alt + del keys to close the application..

[holly]

Just for curosity - is this possible on a CE operating system???

[Dreamlax]

No, the SystemParametersInfo function is not availible on Windows CE, and I can't think of another way to do it, since you can't create a keyboard hook function either.

[holly]

OK, Thanks again for all your help!! Its very much appreciated!!

[street_skater]

If You really want to disable ctrl alt del...you can. Its sort of a trick but it works on all windows i think. heres how to do it..

add a timer to your program and set it to false and set the interval anywhere between 1 - 100. Then add this at the top of your program....

Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Const WM_CLOSE = &H10

Then on the timer put this....


Private Sub Timer1_Timer()
Const WM_CLOSE = &H10
Dim winHwnd As Long
Dim RetVal As Long
winHwnd = FindWindow(vbNullString, "Windows Task Manager")
If winHwnd <> 0 Then
PostMessage winHwnd, WM_CLOSE, 0&, 0&
Else
End If
End Sub

Then add this to when form loads...

Timer1.Enabled = True

and to disable just put

Timer1.Enabled = False

Hope this helped

[BuggyProgrammer]

ARGAHGHGHAGHHAHHHH

don't reply to posts that are old. don't do that. don't. don't.