Solved

disabling ctrl+alt+del in windows-95

Posted on 1998-07-17
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Last Modified: 2010-05-03
How can i disable the ctrl+alt+del combination in windows-95 .That is when a user presses this combination he gets a dialog box from where he can terminate any process. I don't want this to happen?can any body help me.I want the souurce code in visual basic using API functions.
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Question by:ZENO
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Dalin earned 80 total points
Comment Utility
ZENO,
Try this. let me know if you have any problems
Regards
Dalin

Private Const SPI_SCREENSAVERRUNNING = 97&

Private Declare Function SystemParametersInfo Lib "User32" Alias "SystemParametersInfoA" (ByVal uAction As Long,
ByVal uParam As Long, lpvParam As Any, ByVal fuWinIni As Long) As Long

Public Sub AllowKeys(bParam as Boolean)

Dim lRetVal As Long, bOld As Boolean

lRetVal = SystemParametersInfo(SPI_SCREENSAVERRUNNING, bParam, bOld, 0&)

End Sub


To Call

AllowKeys(False)    ' Disable

AllowKeys(True)  'Enable
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Author Comment

by:ZENO
Comment Utility
This worked perfectly.Thanks a lot.just do help me to find a window and then make it disappear from the taskbar using API.That is if Microsoft Word is open i want to be able to hide it from taskbar when i run my VB program.Can you tell me the HEX codes for other system key combinations like ctrl+esc etc.

Thank you.I will increase the points to 59.Thats all the points I have got.
Bye and thank you once again...
Zeus.
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Author Comment

by:ZENO
Comment Utility
Adjusted points to 60
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LVL 9

Expert Comment

by:Dalin
Comment Utility
ZENO,
Here is the code for Hide the App from the task bar.
(This uses notepad as example. You need to change it to your app).

You should have a lot more point than that. You should have at least 280 points by now. If you don't, post a question in the costomer service area and ask linda to look at your account.

Regards
Dalin
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Author Comment

by:ZENO
Comment Utility
you did not give the code.I am readjusting the points to 75 .Please do send me the code.
Bye
zeno
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Expert Comment

by:Dalin
Comment Utility
Zeno
Sorry, I must have forgetting to paste the code. Did not  mean to delay.
Regards
Dalin


'Declarations

Declare Function SetWindowPos Lib "user32" (ByVal hwnd _
As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, _
ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal _
wFlags As Long) As Long    

Declare Function FindWindow Lib "user32" Alias _
"FindWindowA" (ByVal lpClassName As String, ByVal _
lpWindowName As String) As Long

Const SWP_HIDEWINDOW = &H80
Const SWP_SHOWWINDOW = &H40    

'Code to Hide the Taskbar
Dim Thwnd as Long
Thwnd = FindWindow("Shell_traywnd", "")
Call SetWindowPos(Thwnd, 0, 0, 0, 0, 0, SWP_HIDEWINDOW)    

'Code to Show the Taskbar

Dim Thwnd as Long
Thwnd = FindWindow("Shell_traywnd", "")
Call SetWindowPos(Thwnd, 0, 0, 0, 0, 0, SWP_SHOWWINDOW)
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Author Comment

by:ZENO
Comment Utility
this code hides the whole of taskbar idont want that i just want my application that is word to not appear on the taskbar whereas the remaining application continue to do so.I have increased the points to 80.Thank you
Zeus
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LVL 9

Expert Comment

by:Dalin
Comment Utility
Sorry...
Here is the code to hide your app from the task bar
Regards
DAlin


    Public Const SWP_NOSIZE = &H1
    Public Const SWP_NOMOVE = &H2
    Public Const SWP_NOZORDER = &H4
    Public Const SWP_NOREDRAW = &H8
    Public Const SWP_NOACTIVATE = &H10
    Public Const SWP_HIDEWINDOW = &H80

    Public Const MAX_LENGTH = 1024

    Declare Function SetWindowPos Lib "user32" (ByVal hWnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal
    cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
    Declare Function EnumWindows Lib "user32" (ByVal lpEnumFunc As Long, ByVal LParam As Long) As Long

    Public Function EnumWindowProc(ByVal hWnd As Long, ByVal Param As Long) As Long
        Dim sName As String
        sName = Space(MAX_LENGTH)
        If GetClassName(hWnd, sName, MAX_LENGTH) <> 0 Then
            If Left$(sName, InStr(sName, vbNullChar) - 1) = "Notepad" Then
                SetWindowPos hWnd, 0, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE Or SWP_NOZORDER Or SWP_NOACTIVATE Or
    SWP_HIDEWINDOW
            End If
        End If
        EnumWindowProc = 1
    End Function

    Private Function HideWindow()
        EnumWindows AddressOf EnumWindowProc, 0
    End Function
0
 

Author Comment

by:ZENO
Comment Utility
Thanks for your answer.I found abetter way infact which does not require this much of code.that is by searching for the window using findwindow api with parameters of vbnullstring and name of window and once you get the handle of window you hide it from the taskbar.
Thanks anyway...
Zeus
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