| Determine if the computer has established a modem connection Public Declare Function RasEnumConnections Lib "RasApi32.dll" Alias "RasEnumConnectionsA" (lpRasCon As Any, lpcb As Long, lpcConnections As Long) As Long Public Declare Function RasGetConnectStatus Lib "RasApi32.dll" Alias "RasGetConnectStatusA" (ByVal hRasCon As Long, lpStatus As Any) As Long Public Const RAS95_MaxEntryName = 256 Public Const RAS95_MaxDeviceType = 16 Public Const RAS95_MaxDeviceName = 32 Public Type RASCONN95 dwSize As Long hRasCon As Long szEntryName(RAS95_MaxEntryName) As Byte szDeviceType(RAS95_MaxDeviceType) As Byte szDeviceName(RAS95_MaxDeviceName) As Byte End Type Public Type RASCONNSTATUS95 dwSize As Long RasConnState As Long dwError As Long szDeviceType(RAS95_MaxDeviceType) As Byte szDeviceName(RAS95_MaxDeviceName) As Byte End Type Public Function IsModemConnected() As Boolean Dim TRasCon(255) As RASCONN95 Dim lg As Long Dim lpcon As Long Dim RetVal As Long Dim Tstatus As RASCONNSTATUS95 TRasCon(0).dwSize = 412 lg = 256 * TRasCon(0).dwSize RetVal = RasEnumConnections(TRasCon(0), lg, lpcon) If RetVal <> 0 Then MsgBox "ERROR" Exit Function End If Tstatus.dwSize = 160 RetVal = RasGetConnectStatus(TRasCon(0).hRasCon, Tstatus) If Tstatus.RasConnState = &H2000 Then IsModemConnected = True Else IsModemConnected = False End If End Function |
Determine if the computer has established a modem |
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