form1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Imports VB = Microsoft.VisualBasic
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 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.Button1 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        '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(72, 56)
        Me.Button1.Name = "Button1"
        Me.Button1.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Button1.Size = New System.Drawing.Size(182, 32)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "启动"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.Control
        Me.ClientSize = New System.Drawing.Size(312, 149)
        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 = "启动默认的拨号连接"
        Me.ResumeLayout(False)

    End Sub
#End Region
    Private Sub Button1_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Button1.Click
        '启动默认拨号连接
        Shell("rundll rnaui.dll,RnaDial " & GetConnect(), AppWinStyle.NormalFocus)
    End Sub

    Public Function GetConnect() As String
        Dim hKey As Integer
        Dim SubKey As String
        hKey = HKEY_CURRENT_USER '主键
        SubKey = "RemoteAccess" '子键
        '取得默认连接名
        GetConnect = GetRegValue(hKey, SubKey, "Default")
    End Function

    Public Function GetRegValue(ByRef hKey As Integer, ByRef lpszSubKey As String, ByRef szKey As String) As Object
        On Error GoTo ErrorRoutineErr
        Dim phkResult As Integer
        Dim lResult As Integer
        Dim szBuffer As String
        Dim lBuffSize As Integer

        '创建缓冲区
        szBuffer = Space(255)
        lBuffSize = Len(szBuffer)

        '打开注册键
        RegOpenKeyEx(hKey, lpszSubKey, 0, 1, phkResult)

        '查询结果
        lResult = RegQueryValueEx(phkResult, szKey, 0, 0, szBuffer, lBuffSize)

        '关闭注册键
        RegCloseKey(phkResult)

        '返回结果
        If lResult = ERROR_SUCCESS Then
            GetRegValue = VB.Left(szBuffer, lBuffSize - 1)
        Else
            GetRegValue = ""
        End If
        Exit Function

ErrorRoutineErr:
        GetRegValue = ""

    End Function

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub
End Class