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To check to see if there is a DUN I use one of two ways
1:
Code:
Public Declare Function InternetGetConnectedState _
Lib "wininet.dll" (ByRef lpSFlags As Long, _
ByVal dwReserved As Long) As Long
Public Const INTERNET_CONNECTION_MODEM As Long = &H1
Public Function ViaModem() As Boolean
Dim SFlags As Long
Call InternetGetConnectedState(SFlags, 0&)
ViaModem = SFlags And INTERNET_CONNECTION_MODEM
End Function
Now this works fine in win98 and win95. However it always returns true in WinME??!?? Thank you microsoft!
So I tried this method:
2.
Code:
Public Const ERROR_SUCCESS = 0&
Public Const APINULL = 0&
Public Const HKEY_LOCAL_MACHINE = &H80000002
Public ReturnCode As Long
Declare Function RegCloseKey Lib "advapi32.dll" (ByVal _
hKey As Long) As Long
Declare Function RegOpenKey Lib "advapi32.dll" Alias _
"RegOpenKeyA" (ByVal hKey As Long, ByVal lpSubKey As _
String, phkResult As Long) As Long
Declare Function RegQueryValueEx Lib "advapi32.dll" Alias _
"RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName _
As String, ByVal lpReserved As Long, lpType As Long, _
lpData As Any, lpcbData As Long) As Long
Public Function ActiveConnection() As Boolean
Dim hKey As Long
Dim lpSubKey As String
Dim phkResult As Long
Dim lpValueName As String
Dim lpReserved As Long
Dim lpType As Long
Dim lpData As Long
Dim lpcbData As Long
ActiveConnection = False
lpSubKey = "System\CurrentControlSet\Services\RemoteAccess"
ReturnCode = RegOpenKey(HKEY_LOCAL_MACHINE, lpSubKey, _
phkResult)
If ReturnCode = ERROR_SUCCESS Then
hKey = phkResult
lpValueName = "Remote Connection"
lpReserved = APINULL
lpType = APINULL
lpData = APINULL
lpcbData = APINULL
ReturnCode = RegQueryValueEx(hKey, lpValueName, _
lpReserved, lpType, ByVal lpData, lpcbData)
lpcbData = Len(lpData)
ReturnCode = RegQueryValueEx(hKey, lpValueName, _
lpReserved, lpType, lpData, lpcbData)
If ReturnCode = ERROR_SUCCESS Then
If lpData = 0 Then
ActiveConnection = False
Else
ActiveConnection = True
End If
End If
RegCloseKey (hKey)
End If
End Function
This also works fine except if the computer is reset while there was an internet connection. When the machine boots it always returns true until a new internet connection is astablished and disconnected.
Any ideas?
If it's possible to check the modem status i.e. dialling, connection, etc that will also be fine.
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Thanks HeSaidJoe. Unfortunately some people use 9600bps modems and I need to check quickly. Any other ideas?
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A modem should use one of the COM ports right? How about checking the status of the port using the MSCOMM control in a regular time interval?
[Edited by shafee on 11-17-2000 at 04:10 PM]
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Ok. Found the problem. If a network card is installed number 1 always returns true. Otherwise it works fine. What the hell has a network card got to do with the current connection status of a modem?????? :confused:
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that might be because most computers that are networked are networked not only to share resources such as printers but also the internet connection
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Ok. Back to the first one. I changed the declaration to this:
Code:
Private Declare Function InternetGetConnectedStateEx Lib "wininet.dll" Alias "InternetGetConnectedStateExA" (ByRef lpdwFlags As Long, ByVal lpszConnectionName As String, ByVal dwNameLen As Long, ByVal dwReserved As Long) As Long
This method works. Thanks for your help guys.
