关闭ctrl+alt+del.frm

Windows API函数,希望大伙有用哦

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   2145
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4380
   LinkTopic       =   "Form1"
   ScaleHeight     =   2145
   ScaleWidth      =   4380
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "退   出"
      Height          =   315
      Left            =   2760
      TabIndex        =   0
      Top             =   1380
      Width           =   1125
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
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
Const SPI_SCREENSAVERRUNNING = 97
Public Sub Disable_Ctrl_Alt_Del()
'使 Ctrl+Alt+Del 失效
    SystemParametersInfo SPI_SCREENSAVERRUNNING, True, 0, 0
End Sub
Public Sub Enable_Ctrl_Alt_Del()
'使 Ctrl+Alt+Del 有效
    SystemParametersInfo SPI_SCREENSAVERRUNNING, False, 0, 0
End Sub
Private Sub Form_Load()
    Disable_Ctrl_Alt_Del
End Sub
Private Sub Command1_Click()
    Enable_Ctrl_Alt_Del
    Unload Me
End Sub