На этом сайте в разделе "Библиотека кодов" есть отличный пример как это сделать. Добавьте на форму элемент CommandButton. При нажатии на кнопку происходит вызов функции HangUp, которая закрывает соединение с Интернетом. Const RAS_MAXENTRYNAME As Integer = 256 Const RAS_MAXDEVICETYPE As Integer = 16 Const RAS_MAXDEVICENAME As Integer = 128 Const RAS_RASCONNSIZE As Integer = 412 Const ERROR_SUCCESS = 0& Private Type RasEntryName dwSize As Long szEntryName(RAS_MAXENTRYNAME) As Byte End Type Private 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 Private Declare Function RasEnumConnections Lib "rasapi32.dll" Alias "RasEnumConnectionsA" (lpRasConn As Any, lpcb As Long, lpcConnections As Long) As Long Private Declare Function RasHangUp Lib "rasapi32.dll" Alias "RasHangUpA" (ByVal hRasConn As Long) As Long Private gstrISPName As String Public ReturnCode As Long Public Sub HangUp() 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) End If 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 Private Sub Command1_Click() Call HangUp End Sub
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