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IT技术控件


本篇文章具有一定的基础性和广泛的实用性 相信能够给 初学者带来一定的帮助
本文所使用的编程环境是Microsoft Visual Studio 首先打开 Visual Studio 在文件 (File) 菜单上 单击新建项目 (New Project) 在新建项目 (New Project) 对话框的模板 (Templates) 窗格中 单击 Windows 应用程序 (Windows Application) 单击确定 (OK)
具体步骤如下
首先在Form 窗体上添加一个Label 控件属性text设置为:今天: 然后分别添加 个button控件name分别为button button button 它们的text属性分别为 关闭计算机（启动定时器） 注销 重新启动
图
现在我们就需要为程序加上一个定时器了 这个定时器需要与textbox 控件相关联 输入正确时间格式后就可以启动定时功能了 然后我们需要在窗体上添加一个timer 一个textbox 控件 和一个RadioButton 控件 让它们保留默认值不变 其中 TextBox 控件的text属性设置为 : : RadioButton 控件text设置为 指定时间关机|时间格式 小时: 分钟: 秒如图 所示
图
以上界面工作基本完成现在需要输入代码了
双击窗体进入常规 声明Public Class Form 事件中
CODE
Imports System Runtime InteropServicesImports Microsoft VisualBasicPublic Class Form_ 调用系统参数Friend Shared Function GetCurrentProcess() As IntPtrEnd Function
_Friend Shared Function OpenProcessToken(ByVal h As IntPtr
ByVal acc As Integer ByRef phtok As IntPtr) As BooleanEnd Function
_Friend Shared Function LookupPrivilegeValue(ByVal host As String
ByVal name As String ByRef pluid As Long) As BooleanEnd Function
_Friend Shared Function AdjustTokenPrivileges(ByVal htok As IntPtr
ByVal disall As Boolean ByRef newst As TokPriv Luid
ByVal len As Integer ByVal prev As IntPtr
ByVal relen As IntPtr) As BooleanEnd Function
_Friend Shared Function ExitWindowsEx(ByVal flg As Integer
ByVal rea As Integer) As BooleanEnd Function
Friend Const SE_PRIVILEGE_ENABLED As Integer = H Friend Const TOKEN_QUERY As Integer = H Friend Const TOKEN_ADJUST_PRIVILEGES As Integer = H Friend Const SE_SHUTDOWN_NAME As String = SeShutdownPrivilege Friend Const EWX_LOGOFF As Integer = H 注销计算机Friend Const EWX_SHUTDOWN As Integer = H 关闭计算机Friend Const EWX_REBOOT As Integer = H 重新启动计算机Friend Const EWX_FORCE As Integer = H 关闭所有进程 注销计算机Friend Const EWX_POWEROFF As Integer = H Friend Const EWX_FORCEIFHUNG As Integer = H
_引用参数　Friend Structure TokPriv Luid　Public Count As Integer　Public Luid As Long　Public Attr As IntegerEnd Structure
Private Shared Sub DoExitWin(ByVal flg As Integer)　Dim xc As Boolean 判断语句　Dim tp As TokPriv Luid　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 =tp Luid =tp Attr = SE_PRIVILEGE_ENABLED　xc = LookupPrivilegeValue(Nothing SE_SHUTDOWN_NAME tp Luid)　xc = AdjustTokenPrivileges(htok False tp IntPtr Zero IntPtr Zero)　xc = ExitWindowsEx(flg )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
注销button 按钮输入code
Private Sub Button _Click(ByVal sender As System Object
ByVal e As System EventArgs) Handles Button ClickLogoOff() 注销计算机End Sub
双击重新启动按钮button 输入code
Private Sub Button _Click(ByVal sender As System Object
ByVal e As System EventArgs) Handles Button Click
Reboot()

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