'///////////////////////////////////////////////////////////////////////////////////////////////////////////////////// '// 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 FORMAT_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 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 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(FormatError(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(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 Private 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 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 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 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