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VB.NET 2005编写定时关机程序

作者：佚名    文章来源：网络    点击数：    更新时间：2007-8-15
　


双击窗体进入常规-声明Public Class Form1 事件中

　　CODE:

Imports System.Runtime.InteropServices
Imports Microsoft.VisualBasic
Public Class Form1
<DllImport("kernel32.dll", ExactSpelling:=True)> _'调用系统参数
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)> _
　 '引用参数
　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

Dim entTime As Object '保存输入时间
Dim xianzaiTime As Object '保存实时时间
Dim startTime As Object '保存开始定时时间

　　双击注销button2按钮输入code:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
LogoOff()'注销计算机
End Sub

　　双击重新启动按钮button3，输入code:

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

Reboot()

End Sub

　　双击关闭计算机按钮button1,输入code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
　startTime = TimeOfDay
　If Not IsDate(TextBox1.Text) Then
　　'用IsData函数判断输入的时间格式
　　MsgBox("你所输入的不是时间格式,!", , "错误")
　Else
　　entTime = TimeValue(TextBox1.Text)
　End If
　Timer1.Enabled = True
　'启动定时器
　Me.WindowState = System.Windows.Forms.FormWindowState.Minimized
　'最小化窗体

End Sub

 

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