关闭Windows所调用的API函数是ExitWindowsEx,而WinNT/2000基于安全性的考虑,必须先以AdjustTokenPrivileges API函数设置安全级别,才能关机。
例:
在BAS文件中定义
Option ExplicitDeclare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long'ExitWindowsEx的参数uflags,有四个对应值,分别是:
Public Const EWX_LOGOFF = 0 '退出(注销)
Public Const EWX_SHUTDOWN = 1 '关机
Public Const EWX_REBOOT = 2 '重启动
Public Const EWX_FORCE = 4 '强制关机,即不通知现在活动应用程序让其先自我关闭Public Const TOKEN_ADJUST_PRIVILEGES = &H20
Public Const TOKEN_QUERY = &H8
Public Const SE_PRIVILEGE_ENABLED = &H2
Public Const ANYSIZE_ARRAY = 1Type LUID
lowpart As Long
highpart As Long
End TypeType LUID_AND_ATTRIBUTES
pLuid As LUID
Attributes As Long
End TypeType TOKEN_PRIVILEGES
PrivilegeCount As Long
Privileges(ANYSIZE_ARRAY) As LUID_AND_ATTRIBUTES
End TypeDeclare 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'这个函数就是用于NT关机中使用的
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在Form中调用如下:
Option ExplicitDim uFlags As LongPrivate Sub Command1_Click()
AdjustTokenPrivilegesForNT '在95/98中调用没作用,但为了和NT兼容,写上无妨
ExitWindowsEx uFlags, 0 '这里将uFlgs换成以上Bas中所提到的四个参数之一即可
End Sub
例:
在BAS文件中定义
Option ExplicitDeclare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long'ExitWindowsEx的参数uflags,有四个对应值,分别是:
Public Const EWX_LOGOFF = 0 '退出(注销)
Public Const EWX_SHUTDOWN = 1 '关机
Public Const EWX_REBOOT = 2 '重启动
Public Const EWX_FORCE = 4 '强制关机,即不通知现在活动应用程序让其先自我关闭Public Const TOKEN_ADJUST_PRIVILEGES = &H20
Public Const TOKEN_QUERY = &H8
Public Const SE_PRIVILEGE_ENABLED = &H2
Public Const ANYSIZE_ARRAY = 1Type LUID
lowpart As Long
highpart As Long
End TypeType LUID_AND_ATTRIBUTES
pLuid As LUID
Attributes As Long
End TypeType TOKEN_PRIVILEGES
PrivilegeCount As Long
Privileges(ANYSIZE_ARRAY) As LUID_AND_ATTRIBUTES
End TypeDeclare 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'这个函数就是用于NT关机中使用的
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在Form中调用如下:
Option ExplicitDim uFlags As LongPrivate Sub Command1_Click()
AdjustTokenPrivilegesForNT '在95/98中调用没作用,但为了和NT兼容,写上无妨
ExitWindowsEx uFlags, 0 '这里将uFlgs换成以上Bas中所提到的四个参数之一即可
End Sub
Public Const EWX_LOGOFF = 0 '退出(注销)
Public Const EWX_SHUTDOWN = 1 '关机
Public Const EWX_REBOOT = 2 '重启动
Public Const EWX_FORCE = 4 '强制关机,即不通知现在活动应用程序让其先自我关闭你试着用EWX_FORCE看看!