VB.NET中实现"关机/休眠/重启/注销

 
'/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
'// 版 权：(c) 2005 wjt276制作室 //////
'// 作 者：吴俊涛 QQ：29248671 //////
'// E-mail：bo_tao@126.com //////
'// 主 页：http://wjt276.home4u.china.com //////
'// //////
'// 类名称：VB.NET中实现"关机/休眠/重启/注销"的类 ExitWindwos //////
'// 声　明：本源代码的前身搜索网络后再行修改的，至于是哪位我的，我现在也不知道，如我侵犯了您的权利，请你告诉我 //////
'// 本源代码供任何编程都使用，但请不要把本源代码用于任何商业用途，如果特殊需要，请和作者联系 //////
'// 功 能："关机/休眠/重启/注销"的类 //////
'// 说　明：以前退出Windows98简单调用ExitWindwosEX函数就可以了，但是Windows NT以上版本就不一样了，如简单调用函 //////
'// ExitWindwosEX只能实现“注销”功能，在这些版本中退出Windows要得到Shutdown的许可，得到它的许可，可调 //////
'// API函数进行相关操作。 //////
'// 环　境：Visual Basic .NET //////
'// //////
'// 收集时间：2005－02－29 　　　　　　 //////
'// 修改时间：2005－05－06　　　 //////
'// 范　　例：Dim ExitWindows As New ExitWindwos //////
'// ExitWindows.Suspend() 　待机 //////
'// ExitWindows.PowerOff() 　关闭电源 //////
'// ExitWindows.LogOff() 　注销 //////
'// ExitWindows.Reboot()　　 重启 //////
'// ExitWindows.ShutDown()　 关闭系统 //////
'// ExitWindows.Hibernate() 休眠 //////
'// //////
'// 注：如有什么建议请与我联系，我们一起来讨论这个问题。 //////
'// //////
'/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Imports System
Imports System.Text
Imports System.Diagnostics
Imports System.Runtime.InteropServices
Public Class ExitWindwos
Public Enum RestartOptions
LogOff = 0
PowerOff = 8
Reboot = 2
ShutDown = 1
Suspend = -1
Hibernate = -2
'EWX_FORCE = 4
End Enum

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

Public Structure LUID_AND_ATTRIBUTES

Dim pLuid As LUID

Dim Attributes As Integer
End Structure

Public Structure TOKEN_PRIVILEGES

Dim PrivilegeCount As Integer

Dim Privileges As LUID_AND_ATTRIBUTES
End Structure

Private Const TOKEN_ADJUST_PRIVILEGES = &H20
Private Const TOKEN_QUERY = &H8
Private Const SE_PRIVILEGE_ENABLED = &H2
Private Const [form]AT_MESSAGE_FROM_SYSTEM = &H1000
Private Const EWX_FORCE = 4
Private Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As IntPtr
Private Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As IntPtr) As Integer
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As IntPtr, ByVal lpProcName As String) As IntPtr
Private Declare Function SetSuspendState Lib "Powrprof" (ByVal Hibernate As Integer, ByVal ForceCritical As Integer, ByVal DisableWakeEvent As Integer) As Integer
Private Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As IntPtr, ByVal DesiredAccess As Integer, ByRef TokenHandle As IntPtr) As Integer
Private Declare Function LookupPrivilegevalue Lib "advapi32.dll" Alias "LookupPrivilegevalueA" (ByVal lpSystemName As String, ByVal lpName As String, ByRef lpLuid As LUID) As Integer
Private 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
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Integer, ByVal dwReserved As Integer) As Integer
Private Declare Function [form]atMessage Lib "kernel32" Alias "[form]atMessageA" (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

Private 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

Private 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([form]atError(Marshal.GetLastWin32Error()))
End Sub

Private 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([form]atError(Marshal.GetLastWin32Error()))
If (LookupPrivilegevalue("", privilege, privilegeLUID)) = 0 Then Throw New PrivilegeException([form]atError(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([form]atError(Marshal.GetLastWin32Error()))
End Sub

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

Private 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
FreeLibrary(libPtr)
End If
Return False
End Function

Private Function [form]atError(ByVal number As Integer) As String
Dim Buffer = New StringBuilder(255)
[form]atMessage([form]AT_MESSAGE_FROM_SYSTEM, IntPtr.Zero, number, 0, Buff
8799
er, Buffer.Capacity, 0)
Return Buffer.ToString()
End Function

Public Sub LogOff() '注销
ExitWindows(RestartOptions.Reboot, False)
End Sub

Public Sub PowerOff() '关闭电源
ExitWindows(RestartOptions.PowerOff, False)
End Sub

Public Sub Reboot() '重启计算机
ExitWindows(RestartOptions.Reboot, False)
End Sub

Public Sub ShutDown() '关闭系统
ExitWindows(RestartOptions.ShutDown, False)
End Sub

Public Sub Suspend() '待机
ExitWindows(RestartOptions.Suspend, False)
End Sub

Public Sub Hibernate() '休眠
ExitWindows(RestartOptions.Hibernate, False)
End Sub

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