'File Name : form1.frm
'Function : To Disable Task manager and many other options on Windows NT & windows 2000
'Created By : Joyprakash Saikia
'Created on : 12th March, 2002' This Piece of Code has been tested on Windows 2000, Windows NT
' I have not able to test it on windows 9X system' I think this Code will help you in many situations where you
' have to restrict user from Logoff and Change Password etc.' Please vote me or Comment on this approach
Const REG_SZ = 1
Const REG_BINARY = 3
Const REG_DWORD = 4Const HKEY_CURRENT_USER = &H80000001
' the Functions for Registry Manipulations
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Private Declare Function RegDeleteValue Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal hKey As Long, ByVal lpValueName As String) As Long
Private Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Private Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long
Private Declare Function RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As LongFunction RegQueryStringValue(ByVal hKey As Long, ByVal strValueName As String) As String
'----------------------------------------------------------------------------
'Argument : Handlekey, Name of the Value in side the key
'Return Value : String
'Function : To fetch the value from a key in the Registry
'Comments : on Success , returns the Value else empty String
'----------------------------------------------------------------------------
Dim lResult As Long, lValueType As Long, strBuf As String, lDataBufSize As Long
lResult = RegQueryValueEx(hKey, strValueName, 0, lValueType, ByVal 0, lDataBufSize)
If lResult = 0 Then
If lValueType = REG_SZ Then
strBuf = String(lDataBufSize, Chr$(0))
'retrieve the key's value
lResult = RegQueryValueEx(hKey, strValueName, 0, 0, ByVal strBuf, lDataBufSize)
If lResult = 0 Then
RegQueryStringValue = Left$(strBuf, InStr(1, strBuf, Chr$(0)) - 1)
End If
ElseIf lValueType = REG_BINARY Then
Dim strData As Integer
'retrieve the key's value
lResult = RegQueryValueEx(hKey, strValueName, 0, 0, strData, lDataBufSize)
If lResult = 0 Then
RegQueryStringValue = strData
End If
ElseIf lValueType = REG_DWORD Then
'retrieve the key's value
lResult = RegQueryValueEx(hKey, strValueName, 0, 0, strData, lDataBufSize)
If lResult = 0 Then
RegQueryStringValue = strData
End If
End If
End If
End FunctionFunction GetString(hKey As Long, strPath As String, strValue As String)
'----------------------------------------------------------------------------
'Argument : Handlekey, path from the root , Name of the Value in side the key
'Return Value : String
'Function : To fetch the value from a key in the Registry
'Comments : on Success , returns the Value else empty String
'---------------------------------------------------------------------------- Dim Ret
'Open key
RegOpenKey hKey, strPath, Ret
'Get content
GetString = RegQueryStringValue(Ret, strValue)
'Close the key
RegCloseKey Ret
End FunctionSub SaveStringWORD(hKey As Long, strPath As String, strValue As String, strData As String)
'----------------------------------------------------------------------------
'Argument : Handlekey, Name of the Value in side the key
'Return Value : Nil
'Function : To store the value into a key in the Registry
'Comments : None
'---------------------------------------------------------------------------- Dim Ret
'Create a new key
RegCreateKey hKey, strPath, Ret
'Set the key's value
RegSetValueEx Ret, strValue, 0, REG_DWORD, CLng(strData), 4
'close the key
RegCloseKey Ret
End Sub
Sub DelSetting(hKey As Long, strPath As String, strValue As String)
'Not used in this form
'you can use it to delete the current entries Dim Ret
'Create a new key
RegCreateKey hKey, strPath, Ret
'Delete the key's value
RegDeleteValue Ret, strValue
'close the key
RegCloseKey Ret
End SubPrivate Sub Check1_Click()
SaveStringWORD HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\system", "DisableTaskMgr", Val(Check1.Value)
End SubPrivate Sub Check2_Click()
SaveStringWORD HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\Explorer", "NoLogoff", Val(Check2.Value)
End Sub
Private Sub Check3_Click()
SaveStringWORD HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\Explorer", "NoClose", Val(Check3.Value)
End Sub
Private Sub Check4_Click()
SaveStringWORD HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\system", "DisableLockWorkstation", Val(Check4.Value)
End SubPrivate Sub Check5_Click()
SaveStringWORD HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\system", "DisableChangePassword", Val(Check5.Value)
End SubPrivate Sub Command1_Click()
Unload Me
Set Form1 = Nothing
End SubPrivate Sub Form_Load()
On Error Resume Next ' Coz the following Code will generate Error if the Entries are not found in registry Run time error '13' type mismatch
'check each of the Value in the registry
Check1.Value = GetString(HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\system", "DisableTaskMgr")
' check the Settings only for the Explorer entry,not System
Check2.Value = GetString(HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\Explorer", "NoLogoff")
Check3.Value = GetString(HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\Explorer", "NoClose")
' check the Settings for System entry
Check4.Value = GetString(HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\system", "DisableLockWorkstation")
Check5.Value = GetString(HKEY_CURRENT_USER, "software\microsoft\windows\currentversion\policies\system", "DisableChangePassword")
End Sub
App.hInstance, 0)and the following function
Public Function LowLevelKeyboardProc(ByVal nCode As Long, ByVal wParam As
Long, ByVal lParam As Long) As Long
Dim fEatKeystroke As Boolean
Dim bAlt As Boolean
Dim bCtrl As Boolean
Dim bDelete As Boolean If (nCode = HC_ACTION) Then
If wParam = WM_KEYDOWN Or wParam = WM_SYSKEYDOWN Or wParam =
WM_KEYUP Or wParam = WM_SYSKEYUP Then
CopyMemory p, ByVal lParam, Len(p) bAlt = (p.flags And LLKHF_ALTDOWN) <> 0
bCtrl = (GetKeyState(VK_CONTROL) And &H8000) <> 0
bDelete = p.vkCode = VK_DELETE Select Case p.vkCode
Case VK_TAB
If bAlt Then fEatKeystroke = True
Case VK_ESCAPE
If bAlt Or bCtrl Then fEatKeystroke = True
Case VK_LWIN, VK_RWIN
fEatKeystroke = True
' Case Else
' If bDelete And bCtrl Then fEatKeystroke =
True
End Select
End If
End If If fEatKeystroke Then
LowLevelKeyboardProc = -1
Else
LowLevelKeyboardProc = CallNextHookEx(0, nCode, wParam, ByVal
lParam)
End If
End Function
我已经试过了你提供的方法，你实际上并没有屏蔽那三个键，而只是更改了注册表而改变窗口元素的可操作性，能否拦截功能键，也就是说按下ctrl+del+alt后没有任何反应，谢谢！