VB.NET 实现自动关机

主要是调用系统的dll

Imports System
Imports System.Text
Imports System.Diagnostics
Imports System.Runtime.InteropServices

Public Class WindowsController
    Public Enum RestartOptions
        LogOff = 0          ''注销
        PowerOff = 8
        Reboot = 2
        ShutDown = 1
        Suspend = -1
        Hibernate = -2
    End Enum

    Public Structure LUID
        Dim LowPart As Integer
        Dim HighPart As Integer
    End Structure

    Public Structure LUID_AND_ATTRIBUTERS
        Dim pLuid As LUID
        Dim Attributes As Integer
    End Structure

    Public Structure TOKEN_PRIVILEGES
        Dim PrivilegeCount As Integer
        Dim Privileges As LUID_AND_ATTRIBUTERS
    End Structure

    Private Const TOKEN_ADJUST_PRIVILEGES = &H20
    Private Const TOKEN_QUERY = &H8
    Private Const SE_PRIVILEGE_ENABLED = &H2
    Private Const FORMAT_MESSAGE_FROM_SYSTEM = &H1000
    Private Const EWX_FORCE = 4

    Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As IntPtr
    Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As IntPtr) As Integer
    Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As IntPtr, ByVal lpProcName As String) As IntPtr
    Declare Function SetSuspendState Lib "Powrprof" (ByVal Hibernate As Integer, ByVal ForceCritical As Integer, ByVal DisableWakeEvent As Integer) As Integer
    Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As IntPtr, ByVal DesiredAccess As Integer, ByRef TokenHandle As IntPtr) As Integer
    Declare Function LookupPrivilegeValue Lib "advapi32.dll" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As String, ByVal lpName As String, ByRef lpLuid As LUID) As Integer
    Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As IntPtr, ByVal DisableAllPrivileges As Integer, ByRef NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Integer, ByRef PreviousState As TOKEN_PRIVILEGES, ByRef ReturnLength As Integer) As Integer
    Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Integer, ByVal dwReserved As Integer) As Integer
    Declare Function FormatMessage Lib "kernel32" Alias "FormatMessageA" (ByVal dwFlags As Integer, ByVal lpSource As IntPtr, ByVal dwMessageId As Integer, ByVal dwLanguageId As Integer, ByVal lpBuffer As StringBuilder, ByVal nSize As Integer, ByVal Arguments As Integer) As Integer

    Public Sub ExitWindows(ByVal how As RestartOptions, ByVal force As Boolean)
        Select Case how
            Case RestartOptions.Suspend
                SuspendSystem(False, force)
            Case RestartOptions.Hibernate
                SuspendSystem(True, force)
            Case Else
                ExitWindows(Convert.ToInt32(how), force)
        End Select

    End Sub

    Public Sub ExitWindows(ByVal how As Integer, ByVal force As Boolean)
        EnableToken("SeShutdownPrivilege")
        If force Then how = how Or EWX_FORCE
        If (ExitWindowsEx(how, 0) = 0) Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
    End Sub

    Protected Sub EnableToken(ByVal privilege As String)
        If Not CheckEntryPoint("advapi32.dll", "AdjustTokenPrivileges") Then Return
        Dim tokenHandle As IntPtr = IntPtr.Zero
        Dim privilegeLUID = New LUID()
        Dim newPrivileges = New TOKEN_PRIVILEGES
        Dim tokenPrivileges As TOKEN_PRIVILEGES
        If (OpenProcessToken(Process.GetCurrentProcess.Handle, TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, tokenHandle)) = 0 Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
        If (LookupPrivilegeValue("", privilege, privilegeLUID)) = 0 Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
        tokenPrivileges.PrivilegeCount = 1
        tokenPrivileges.Privileges.Attributes = SE_PRIVILEGE_ENABLED
        tokenPrivileges.Privileges.pLuid = privilegeLUID
        Dim Size As Integer = 4
        If (AdjustTokenPrivileges(tokenHandle, 0, tokenPrivileges, 4 + (12 * tokenPrivileges.PrivilegeCount), newPrivileges, Size)) = 0 Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))

    End Sub

    Protected Sub SuspendSystem(ByVal hibernate As Boolean, ByVal force As Boolean)
        If Not CheckEntryPoint("powrprof.dll", "SetSuspendState") Then
            Throw New PlatformNotSupportedException("The SetSuspendState method is not supported on this system!")
            SetSuspendState(Convert.ToInt32(IIf(hibernate, 1, 0)), Convert.ToInt32(IIf(force, 1, 0)), 0)
        End If
    End Sub

    Protected Function CheckEntryPoint(ByVal library As String, ByVal method As String) As Boolean
        Dim libPtr As IntPtr = LoadLibrary(library)
        If Not libPtr.Equals(IntPtr.Zero) Then
            If Not GetProcAddress(libPtr, method).Equals(IntPtr.Zero) Then
                FreeLibrary(libPtr)
                Return True
            End If
        End If
        FreeLibrary(libPtr)
        Return False
    End Function

    Protected Function FormatError(ByVal number As Integer) As String
        Dim Buffer = New StringBuilder(255)
        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, IntPtr.Zero, number, 0, Buffer, Buffer.Capacity, 0)
        Return Buffer.ToString()
    End Function
End Class

Public Class PrivilegeException
    Inherits Exception

    Public Sub New()
        MyBase.New()
    End Sub

    Public Sub New(ByVal message As String)
        MyBase.New(message)
    End Sub
End Class

 

调用方法

Dim shutdown As New WindowsController
shutdown.ExitWindowsEx(shutdown.RestartOptions.LogOff, False)

 

页面的就看大家的习惯了，可以自己来实现！