form1.frm

电子书“Visual Basic 6 网络编程实例教程.rar”

VERSION 5.00
Begin VB.Form Form1 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "网络连接是否可用"
   ClientHeight    =   2745
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   4635
   Icon            =   "Form1.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2745
   ScaleWidth      =   4635
   StartUpPosition =   2  '屏幕中心
   Begin VB.TextBox Text5 
      Height          =   270
      Left            =   1680
      TabIndex        =   10
      Text            =   "Text5"
      Top             =   1800
      Width           =   2655
   End
   Begin VB.TextBox Text4 
      Height          =   270
      Left            =   1680
      TabIndex        =   9
      Text            =   "Text4"
      Top             =   1440
      Width           =   1215
   End
   Begin VB.TextBox Text3 
      Height          =   270
      Left            =   1680
      TabIndex        =   8
      Text            =   "Text3"
      Top             =   1080
      Width           =   1215
   End
   Begin VB.TextBox Text2 
      Height          =   270
      Left            =   1680
      TabIndex        =   7
      Text            =   "Text2"
      Top             =   720
      Width           =   1215
   End
   Begin VB.TextBox Text1 
      Height          =   270
      Left            =   1680
      TabIndex        =   6
      Text            =   "Text1"
      Top             =   360
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "运行(&R)"
      Height          =   375
      Left            =   1800
      TabIndex        =   0
      Top             =   2280
      Width           =   1215
   End
   Begin VB.Label Label5 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "连接类型"
      Height          =   180
      Left            =   480
      TabIndex        =   5
      Top             =   1845
      Width           =   720
   End
   Begin VB.Label Label4 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "连接是否可用"
      Height          =   180
      Left            =   480
      TabIndex        =   4
      Top             =   1485
      Width           =   1080
   End
   Begin VB.Label Label3 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "AOL连接"
      Height          =   180
      Left            =   480
      TabIndex        =   3
      Top             =   1125
      Width           =   630
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "RAS连接"
      Height          =   180
      Left            =   480
      TabIndex        =   2
      Top             =   765
      Width           =   630
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "LAN连接"
      Height          =   180
      Left            =   480
      TabIndex        =   1
      Top             =   405
      Width           =   630
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Command1_Click()
    If IsNetConnectionAlive() Then
        Text1.Text = "可用"
    Else
        Text1.Text = "不可用"
    End If
    If IsNetConnectionLAN() Then
        Text3.Text = "可用"
    Else
        Text3.Text = "不可用"
    End If
    If IsNetConnectionRAS() Then
        Text4.Text = "可用"
    Else
        Text4.Text = "不可用"
    End If
    If IsNetConnectionAOL() Then
        Text2.Text = "可用"
    Else
        Text2.Text = "不可用"
    End If
   Text5.Text = GetNetConnectionType()
End Sub

Private Function IsNetConnectionAlive() As Boolean
   Dim tmp As Long
   IsNetConnectionAlive = IsNetworkAlive(tmp) = 1
End Function

Private Function IsNetConnectionLAN() As Boolean
   Dim tmp As Long
   If IsNetworkAlive(tmp) = 1 Then
      IsNetConnectionLAN = tmp = NETWORK_ALIVE_LAN
   End If
End Function

Private Function IsNetConnectionRAS() As Boolean
   Dim tmp As Long
   If IsNetworkAlive(tmp) = 1 Then
      IsNetConnectionRAS = tmp = NETWORK_ALIVE_WAN
   End If
End Function

Private Function IsNetConnectionAOL() As Boolean
   Dim tmp As Long
   If IsNetworkAlive(tmp) = 1 Then
      IsNetConnectionAOL = tmp = NETWORK_ALIVE_AOL
   End If
End Function

Private Function GetNetConnectionType() As String
   Dim tmp As Long
   If IsNetworkAlive(tmp) = 1 Then
      Select Case tmp
         Case NETWORK_ALIVE_LAN:
            GetNetConnectionType = "系统有一个或多个LAN网卡"
         Case NETWORK_ALIVE_WAN:
            GetNetConnectionType = "系统有一个或多个RAS连接"
         Case NETWORK_ALIVE_AOL:
            GetNetConnectionType = "系统已连接上美国在线"
         Case Else:
      End Select
   Else
      GetNetConnectionType = "系统无连接或发生错误"
   End If
End Function