form1.frm

Visual.Basic.NET实用编程百例-47.6M.zip

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "检测网络连接状态"
   ClientHeight    =   2115
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   2640
   LinkTopic       =   "Form1"
   ScaleHeight     =   2115
   ScaleWidth      =   2640
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Command_Detect 
      Caption         =   "检测"
      Height          =   495
      Left            =   720
      TabIndex        =   0
      Top             =   840
      Width           =   1455
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Declare Function InternetGetConnectedState Lib "wininet.dll" _
                (ByRef lpdwFlags As Long, _
                ByVal dwReserved As Long) _
                As Boolean

Private Enum Flags
 
   INTERNET_CONNECTION_LAN = &H2

   INTERNET_CONNECTION_MODEM = &H1

   INTERNET_CONNECTION_PROXY = &H4

   INTERNET_RAS_INSTALLED = &H10
End Enum

Private Sub Command_Detect_Click()
    Dim lngFlags As Long
    
    If InternetGetConnectedState(lngFlags, 0) Then
    
        If lngFlags And Flags.INTERNET_CONNECTION_LAN Then
          
             MsgBox ("使用网卡连接")
        ElseIf lngFlags And Flags.INTERNET_CONNECTION_MODEM Then
           
             MsgBox ("使用调制解调器连接")
        ElseIf lngFlags And Flags.INTERNET_CONNECTION_PROXY Then
           
             MsgBox ("代理连接")
        End If
    Else
       
         MsgBox ("没有连接")
    End If
End Sub