禁用 Alt-Tab 或 Ctrl-Alt-Del

Private Declare Function EnableWindow Lib "user32" (ByVal hWnd As Integer, ByVal aBOOL As Integer) As Integer
Private Declare Function IsWindowEnabled Lib "user32" (ByVal hWnd As Integer) As Integer
Private Declare Function GetMenu Lib "user32" (ByVal hWnd As Integer) As Integer
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
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
Private TaskBarhWnd As Long
Private IsTaskBarEnabled As Integer
Private TaskBarMenuHwnd As Integer

'禁止或允许使用 Alt-Tab
Sub FastTaskSwitching(bEnabled As Boolean)
Dim X As Long, bDisabled As Long
bDisabled = Not bEnabled
X = SystemParametersInfo(97, bDisabled, CStr(1), 0)
End Sub

'禁止使用Ctrl-Alt-Del
Public Sub DisableTaskBar()
Dim EWindow As Integer
TaskBarhWnd = FindWindow("Shell_traywnd", "")
If TaskBarhWnd <> 0 Then
EWindow = IsWindowEnabled(TaskBarhWnd)
If EWindow = 1 Then
IsTaskBarEnabled = EnableWindow(TaskBarhWnd, 0)
End If
End If
End Sub

'允许使用Ctrl-Alt-Del

Public Sub EnableTaskBar()
If IsTaskBarEnabled = 0 Then
IsTaskBarEnabled = EnableWindow(TaskBarhWnd, 1)
End If
End Sub

'禁止 Ctrl Alt Del
'声明(For Win95)：

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
使用：
'禁止
Dim pOld As Boolean
Call SystemParametersInfo(SPI_SCREENSAVERRUNNING, True, pOld, 0)
'开启
Dim pOld As Boolean
Call SystemParametersInfo(SPI_SCREENSAVERRUNNING, False, pOld, 0)

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