在模组声明区中加入以下声明及模组：

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 Const SPI_SCREENSAVERRUNNING = 97

Public Sub Disable_Ctrl_Alt_Del()
'让 CTRL+ALT+DEL 失效
Dim AyW As Integer
Dim TurFls As Boolean
AwY = SystemParametersInfo(SPI_SCREENSAVERRUNNING, True, TurFls, 0)
End Sub

Public Sub Enable_Ctrl_Alt_Del()
'让 CTRL+ALT+DEL 恢复功能
Dim AwY As Integer
Dim TurFls As Boolean
AwY = SystemParametersInfo(SPI_SCREENSAVERRUNNING, False, TurFls, 0)
End Sub

'实际使用时，在 Form 中加入以下程序码：

Private Sub Form_Load()
Disable_Ctrl_Alt_Del
End Sub

Private Sub Form_Unload(Cancel As Integer)
Enable_Ctrl_Alt_Del
End Sub