Private Sub LoQueSea()
Conectar "Teleline"


'Usar la conexión


Desconectar
End Sub

Option Explicit

Public Const RAS_MAXENTRYNAME As Integer = 256
Public Const RAS_MAXDEVICETYPE As Integer = 16
Public Const RAS_MAXDEVICENAME As Integer = 128
Public Const RAS_RASCONNSIZE As Integer = 412
Public Const ERROR_SUCCESS = 0&

Public Type RasEntryName
    dwSize As Long    
    szEntryName(RAS_MAXENTRYNAME) As Byte
End Type

Public Type RasConn
    dwSize As Long
    hRasConn As Long    
    szEntryName(RAS_MAXENTRYNAME) As Byte
    szDeviceType(RAS_MAXDEVICETYPE) As Byte
    szDeviceName(RAS_MAXDEVICENAME) As Byte
End Type

Public Declare Function RasEnumConnections Lib "RasApi32.dll" Alias "RasEnumConnectionsA" (lpRasConn As Any, _
            lpcb As Long, lpcConnections As Long) As Long

Public Declare Function RasHangUp Lib "RasApi32.dll" Alias "RasHangUpA" (ByVal hRasConn As Long) As Long

Public gstrISPName As String

Public ReturnCode As Long

Public Sub Desconectar()
    Dim i As Long
    Dim lpRasConn(255) As RasConn
    Dim lpcb As Long
    Dim lpcConnections As Long
    Dim hRasConn As Long
    
    lpRasConn(0).dwSize = RAS_RASCONNSIZE
    lpcb = RAS_MAXENTRYNAME * lpRasConn(0).dwSize
    lpcConnections = 0
    ReturnCode = RasEnumConnections(lpRasConn(0), lpcb, lpcConnections)
    If ReturnCode = ERROR_SUCCESS Then
        For i = 0 To lpcConnections - 1
            If Trim(ByteToString(lpRasConn(i).szEntryName)) = Trim(gstrISPName) Then hRasConn = lpRasConn(i).hRasConn
            ReturnCode = RasHangUp(ByVal hRasConn)
        Next i
    End If
End Sub

Public Function ByteToString(bytString() As Byte) As String
    Dim i As Integer
    
    ByteToString = ""
    i = 0
    While bytString(i) = 0&
        ByteToString = ByteToString & Chr(bytString(i))
        i = i + 1
    Wend
End Function

Public Sub Conectar(prof As String)
    Shell "rundll32.exe rnaui.dll,RnaDial " & prof
End Sub