关机/重启/注销

Imports System.Runtime.InteropServices

    <DllImport("kernel32.dll", ExactSpelling:=True)> _
    Friend Shared Function GetCurrentProcess() As IntPtr
    End Function

    <DllImport("advapi32.dll", ExactSpelling:=True, SetLastError:=True)> _
    Friend Shared Function OpenProcessToken(ByVal h As IntPtr, ByVal acc As Integer, ByRef phtok As IntPtr) As Boolean
    End Function

    <DllImport("advapi32.dll", SetLastError:=True)> _
    Friend Shared Function LookupPrivilegeValue(ByVal host As String, ByVal name As String, ByRef pluid As Long) As Boolean
    End Function

    <DllImport("advapi32.dll", ExactSpelling:=True, SetLastError:=True)> _
    Friend Shared Function AdjustTokenPrivileges(ByVal htok As IntPtr, ByVal disall As Boolean, ByRef newst As TokPriv1Luid, ByVal len As Integer, ByVal prev As IntPtr, ByVal relen As IntPtr) As Boolean
    End Function

    <DllImport("user32.dll", ExactSpelling:=True, SetLastError:=True)> _
    Friend Shared Function ExitWindowsEx(ByVal flg As Integer, ByVal rea As Integer) As Boolean
    End Function

    Friend Const SE_PRIVILEGE_ENABLED As Integer = &H2
    Friend Const TOKEN_QUERY As Integer = &H8
    Friend Const TOKEN_ADJUST_PRIVILEGES As Integer = &H20
    Friend Const SE_SHUTDOWN_NAME As String = "SeShutdownPrivilege"
    Friend Const EWX_LOGOFF As Integer = &H0 ‘注销计算机
    Friend Const EWX_SHUTDOWN As Integer = &H1 ‘关闭计算机
    Friend Const EWX_REBOOT As Integer = &H2 ‘重新启动计算机
    Friend Const EWX_FORCE As Integer = &H4 ‘关闭所有进程，注销计算机
    Friend Const EWX_POWEROFF As Integer = &H8
    Friend Const EWX_FORCEIFHUNG As Integer = &H10

    <StructLayout(LayoutKind.Sequential, Pack:=1)> _
    Friend Structure TokPriv1Luid
        Public Count As Integer
        Public Luid As Long
        Public Attr As Integer
    End Structure

    Private Shared Sub DoExitWin(ByVal flg As Integer)
        Dim xc As Boolean ‘判断语句
        Dim tp As TokPriv1Luid
        Dim hproc As IntPtr = GetCurrentProcess()
        ‘调用进程值
        Dim htok As IntPtr = IntPtr.Zero
        xc = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, htok)
        tp.Count = 1
        tp.Luid = 0
        tp.Attr = SE_PRIVILEGE_ENABLED
        xc = LookupPrivilegeValue(Nothing, SE_SHUTDOWN_NAME, tp.Luid)
        xc = AdjustTokenPrivileges(htok, False, tp, 0, IntPtr.Zero, IntPtr.Zero)
        xc = ExitWindowsEx(flg, 0)
    End Sub

    Public Shared Sub Reboot()
        DoExitWin((EWX_FORCE Or EWX_REBOOT)) ‘重新启动计算机
    End Sub

    Public Shared Sub PowerOff()
        DoExitWin((EWX_FORCE Or EWX_POWEROFF)) ‘关闭计算机
    End Sub

    Public Shared Sub LogoOff()
        DoExitWin((EWX_FORCE Or EWX_LOGOFF)) ‘注销计算机
    End Sub

关机/重启/注销

原文：http://www.cnblogs.com/lbnnbs/p/4782047.html