Winapi ExitWinDowsecx即使在调整我的特权令牌后也会失败

我正在尝试以编程方式关闭Windows：

Function ExitWindows() As Integer
  Declare Function GetCurrentProcess Lib "Kernel32" () As Integer
  Declare Function OpenProcessToken Lib "AdvApi32" (handle As Integer, access As Integer, ByRef tHandle As Integer) As Boolean
  Declare Function LookupPrivilegeValueW Lib "AdvApi32" (sysName As Ptr, privName As WString, Luid As Ptr) As Boolean
  Declare Function AdjustTokenPrivileges Lib "AdvApi32" (tHandle As Integer, disableAllPrivs As Boolean, newState As Ptr, buffLength As Integer, prevPrivs As Ptr, ByRef retLen As Integer) As Boolean
  Declare Function ExitWindowsEx Lib "User32" (flags As Integer, reason As Integer) As Boolean
  Declare Function GetLastError Lib "Kernel32" () As Integer

  Const SE_PRIVILEGE_ENABLED = &h00000002
  Const TOKEN_QUERY = &h00000008
  Const TOKEN_ADJUST_PRIVILEGES = &h00000020
  Const SE_SHUTDOWN_NAME = "SeShutdownPrivilege"
  Const EWX_SHUTDOWN = &h00000001

  Dim pHandle As Integer = GetCurrentProcess()   //a handle to the current process
  Dim tHandle As Integer                         //a handle to the token

  If OpenProcessToken(pHandle, TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, tHandle) Then
    Dim mb As New MemoryBlock(8)
    mb.UInt32Value(0) = 1
    mb.Int32Value(4) = SE_PRIVILEGE_ENABLED
    Dim pt As Ptr
    If LookupPrivilegeValueW(Nil, "SeShutdownPrivilege", mb) Then
      Dim z As Integer
      If AdjustTokenPrivileges(tHandle, False, mb, mb.Size, pt, z) Then
        If Not ExitWindowsEx(EWX_SHUTDOWN, 0) Then
          Return GetLastError()     //Returns 1314
        End If
      Else 
        Return GetLastError()
      End If
    Else
      Return GetLastError()
    End If
  Else
    Return GetLastError()
  End If
End Function

每个函数调用都会成功，但ExitWindowsEx除外，即使以管理员身份运行，ExitWindowsEx也会始终失败，错误代码为1314（未保留权限）。重新启动有同样的问题，但注销工作

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我在这里做错了什么？

您正在使用错误的mb调用LookupPrivilegeValueW，并将错误的mb传递给我

Dim luid As New MemoryBlock(8)
If LookupPrivilegeValueW(Nil, "SeShutdownPrivilege", luid) Then     
   Dim mb As New MemoryBlock(16)
   mb.UInt32Value(0) = 1
   mb.UInt32Value(4) = luid.UInt32Value(0)
   mb.UInt32Value(8) = luid.UInt32Value(4)
   mb.UInt32Value(12) = SE_PRIVILEGE_ENABLED
   Dim z As Integer
   If AdjustTokenPrivileges(tHandle, False, mb, mb.Size, pt, z) Then

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我认为您的

mb

参数在

AdjustTokenPrivileges

调用中不正确。看@Roman R.我不明白你的意思。LUID不是8字节长吗？不太长。对于LUID和属性，参数为每个元素4字节计数+12字节。你每件事都只传递8个字节。所以，即使有非常大的内存块，我仍然得到1314作为错误返回。啊，太棒了！谢谢你。