VB在Win2000下實現關機

大家可能都知道在Win98下實現關機只須使用ExitWindows或ExitWindowsEx這兩個API函數就可以，但是到了Windows2000下就不好使了，不論設定什麼參數都只是登出，下面教你如何?Win2000下關機。

'表單中代碼

Option Explicit

Dim uFlags As Long

Private Sub Command1_Click()
AdjustTokenPrivilegesForNT '在95/98中調用沒作用，但為了和NT相容，寫上無妨
ExitWindowsEx EWX_REBOOT, 0 '這裡將uFlgs換成以上面標記藍色字中所提到的四個參數之一即可
End Sub

 

'模組中代碼

Option Explicit
Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long

'ExitWindowsEx的參數uflags，有四個對應值，分別是：

Public Const EWX_LOGOFF = 0 '退出(登出)
Public Const EWX_SHUTDOWN = 1 '關機
Public Const EWX_REBOOT = 2 '重啟動
Public Const EWX_FORCE = 4 '強制關機，即不通知現在活動應用程式讓其先自我關閉

Public Const TOKEN_ADJUST_PRIVILEGES = &H20
Public Const TOKEN_QUERY = &H8
Public Const SE_PRIVILEGE_ENABLED = &H2
Public Const ANYSIZE_ARRAY = 1

Type LUID
lowpart As Long
highpart As Long
End Type

Type LUID_AND_ATTRIBUTES
pLuid As LUID
Attributes As Long
End Type

Type TOKEN_PRIVILEGES
PrivilegeCount As Long
Privileges(ANYSIZE_ARRAY) As LUID_AND_ATTRIBUTES
End Type

Declare Function GetCurrentProcess Lib "kernel32" () As Long
Declare Function LookupPrivilegeValue Lib "advapi32.dll" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As String, ByVal lpName As String, lpLuid As LUID) As Long
Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As Long, ByVal DisableAllPrivileges As Long, NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Long, PreviousState As TOKEN_PRIVILEGES, ReturnLength As Long) As Long
Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long

'這個函數就是用於NT關機中使用的
Sub AdjustTokenPrivilegesForNT()

Dim hdlProcessHandle As Long
Dim hdlTokenHandle As Long
Dim tmpLuid As LUID
Dim tkp As TOKEN_PRIVILEGES
Dim tkpNewButIgnored As TOKEN_PRIVILEGES
Dim lBufferNeeded As Long

hdlProcessHandle = GetCurrentProcess()
OpenProcessToken hdlProcessHandle, (TOKEN_ADJUST_PRIVILEGES Or _
TOKEN_QUERY), hdlTokenHandle

LookupPrivilegeValue "", "SeShutdownPrivilege", tmpLuid
tkp.PrivilegeCount = 1
tkp.Privileges(0).pLuid = tmpLuid
tkp.Privileges(0).Attributes = SE_PRIVILEGE_ENABLED

AdjustTokenPrivileges hdlTokenHandle, False, tkp, _
Len(tkpNewButIgnored), tkpNewButIgnored, _
lBufferNeeded
End Sub