form1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Friend Class Form1
    Inherits System.Windows.Forms.Form
#Region "Windows 窗体设计器生成的代码"
    Public Sub New()
        MyBase.New()
        '此调用是 Windows 窗体设计器所必需的。
        InitializeComponent()
    End Sub
    '窗体重写处置，以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal Disposing As Boolean)
        If Disposing Then
            If Not components Is Nothing Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(Disposing)
    End Sub
    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer
    Public ToolTip1 As System.Windows.Forms.ToolTip
    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器来修改它。
    '不要使用代码编辑器修改它。
    Public WithEvents Button3 As System.Windows.Forms.Button
    Public WithEvents Button2 As System.Windows.Forms.Button
    Public WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Me.ToolTip1 = New System.Windows.Forms.ToolTip(Me.components)
        Me.Button3 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button1 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Button3
        '
        Me.Button3.BackColor = System.Drawing.SystemColors.Control
        Me.Button3.Cursor = System.Windows.Forms.Cursors.Default
        Me.Button3.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Button3.Location = New System.Drawing.Point(48, 96)
        Me.Button3.Name = "Button3"
        Me.Button3.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Button3.Size = New System.Drawing.Size(97, 25)
        Me.Button3.TabIndex = 2
        Me.Button3.Text = "关机"
        '
        'Button2
        '
        Me.Button2.BackColor = System.Drawing.SystemColors.Control
        Me.Button2.Cursor = System.Windows.Forms.Cursors.Default
        Me.Button2.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Button2.Location = New System.Drawing.Point(48, 64)
        Me.Button2.Name = "Button2"
        Me.Button2.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Button2.Size = New System.Drawing.Size(97, 25)
        Me.Button2.TabIndex = 1
        Me.Button2.Text = "重新启动"
        '
        'Button1
        '
        Me.Button1.BackColor = System.Drawing.SystemColors.Control
        Me.Button1.Cursor = System.Windows.Forms.Cursors.Default
        Me.Button1.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Button1.Location = New System.Drawing.Point(48, 32)
        Me.Button1.Name = "Button1"
        Me.Button1.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Button1.Size = New System.Drawing.Size(97, 25)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "注销"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.Control
        Me.ClientSize = New System.Drawing.Size(196, 146)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Cursor = System.Windows.Forms.Cursors.Default
        Me.Location = New System.Drawing.Point(4, 23)
        Me.Name = "Form1"
        Me.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Text = "重新启动和关闭计算机"
        Me.ResumeLayout(False)

    End Sub
#End Region
   
    Private Sub AdjustToken()

        '下面程序设置相应的权限以使能在Windows2000/XP系统中注销、重新启动或者关闭
        Const TOKEN_ADJUST_PRIVILEGES As Short = &H20S
        Const TOKEN_QUERY As Short = &H8S
        Const SE_PRIVILEGE_ENABLED As Short = &H2S

        Dim hdlProcessHandle As Integer
        Dim hdlTokenHandle As Integer
        Dim tmpLuid As LUID
        Dim tkp As TOKEN_PRIVILEGES
        Dim tkpNewButIgnored As TOKEN_PRIVILEGES
        Dim lBufferNeeded As Integer

        SetLastError(0)

        hdlProcessHandle = GetCurrentProcess()
        OpenProcessToken(hdlProcessHandle, TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, hdlTokenHandle)

        LookupPrivilegeValue("", "SeShutdownPrivilege", tmpLuid)

        tkp.PrivilegeCount = 1
        tkp.TheLuid = tmpLuid
        tkp.Attributes = SE_PRIVILEGE_ENABLED


        AdjustTokenPrivileges(hdlTokenHandle, False, tkp, Len(tkpNewButIgnored), tkpNewButIgnored, lBufferNeeded)
    End Sub

    Private Sub Button1_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Button1.Click
        If glngWhichWindows32 = mlngWindowsNT Then
            AdjustToken()
        End If

        ExitWindowsEx(EWX_LogOff, 0)
    End Sub

    Private Sub Button3_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Button3.Click
        If glngWhichWindows32 = mlngWindowsNT Then
            AdjustToken()
        End If

        ExitWindowsEx(EWX_SHUTDOWN Or EWX_FORCE Or EWX_POWEROFF, 0)
    End Sub

    Private Sub Button2_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Button2.Click
        If glngWhichWindows32 = mlngWindowsNT Then
            AdjustToken()
        End If

        ExitWindowsEx(EWX_REBOOT, 0)
    End Sub

    Private Sub Form1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load
        '判断当前操作系统的版本
        Dim lngVersion As Integer

        lngVersion = GetVersion()

        If ((lngVersion And &H80000000) = 0) Then
            glngWhichWindows32 = mlngWindowsNT
        Else
            glngWhichWindows32 = mlngWindows95
        End If
    End Sub
End Class