จาก 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

Sub Disabled()
'To disable Ctrl-Alt-Delete:
Call DisableCtrlAltDelete(True)
End Sub

Sub Enabled()
'To enable Ctrl-Alt-Delete:
Call DisableCtrlAltDelete(False)
End Sub

ไม่ทราบว่าจะเรียกใช้งานอย่างไรค่ะ ไว้ใน even ใดของฟอร์มค่ะ ?