a few security questions

is there a way to get rid of the ctrl alt del function for a security program (its a app i'm working on to lock your desktop)?

how do u get a text box to display astricks so someone cannot see a password?

how would you have a password dialog box appear only the first time u ren the app and then save it to a file?

set the PasswordChar property to '*'

:)

To disable/enable ctrl-alt-del, use this code.

VB Code:

Private Declare Function SystemParametersInfo Lib _
"user32" Alias "SystemParametersInfoA" (ByVal uAction _
As Long, ByVal uParam As Long, ByVal lpvParam As Any, _
ByVal fuWinIni As Long) As Long      
 
Sub DisableCtrlAltDelete(bDisabled As Boolean)
    Dim X As Long
    X = SystemParametersInfo(97, bDisabled, CStr(1), 0)
End Sub
 
Private Sub Command1_Click()
    'Disable
    Call DisableCtrlAltDelete(True)
End Sub
 
Private Sub Command2_Click()
    'Enable
    Call DisableCtrlAltDelete(False)
End Sub

Yep, to make asterixes appear in a text box when the user types in it, set the PasswordChar property of the textbox to "*" or whatever character you want to use instead.

What do you mean have the password dialog box appear only the first time you run the app? First time you run it that day or first time you ever run it? If it is first time you ever run it, why not save the password (or whatever) to the registry, eg.

SaveSetting(App.title,"Password",txtPassword.Text)

and then check for it each time the program is run

ThePassword = GetSetting(App.title,"Password","")
If Thepassword = "" then ' <-- IE, if the password does not exist
' show your password form
End If

If you want to stop Ctrl-Alt-Delete, you can trick windows into thinking your application is a screensaver. More info can be found here: http://vb-world.net/api/tip518.html

Hope this helps
- Aurilus

Quote:

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Originally posted by Aurilus
If you want to stop Ctrl-Alt-Delete, you can trick windows into thinking your application is a screensaver. More info can be found here: http://vb-world.net/api/tip518.html

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will this work with windows 2k?