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作者:许城 来源:天极Yesky软件频道 2007年11月9日
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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 |
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 |
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Reboot() End Sub |
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 |
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick xianzaiTime = TimeOfDay If RadioButton1.Checked Then If DateDiff(Microsoft.VisualBasic.DateInterval.Second, xianzaiTime, entTime) < 0 Then '用DateDiff函数判断是否到时间了 End If End If PowerOff() '关闭计算机 End Sub |
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA"(ByVal hwngnd As Integer, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Integer) As Integer |
Private Sub Label3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label3.Click ShellExecute(0, "open", "http://dev.yesky.com ", CStr(0), CStr(0), 1) End Sub End Class |
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