checking internet conection

[Norkis]

Hi,

Does anybody know how detect is internet conection active and if yes then sent text massage to the email, or sent text file to the ftp.

Please help me.

(I need to count how many users use my program)

[email protected]

Here's how to check for a connection:

Declarations

You must put the following code into the declarations section of your project.

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

Code

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

Use

Here is an example of how to use the ActiveConnection function.

If ActiveConnection = True then
    Call MsgBox("You have an active connection.",vbInformation)
Else
    Call MsgBox("You have no active connections.", vbInformation)
End If

Here's how to send the email:
Use the Internet Transfer Control
Connect to the users SMTP server and send the following text to it:

"HELO users_email_goes@this_point.here
MAIL FROM: users_email_goes@this_point.here
RCPT TO: your_email_goes@this_point.here
DATA
This is me sending me an email using blind SMTP
.
QUIT"

That is what's known as blind SMTP, it has no error handling, but is quick and easy. If you want it in more detail buy VB6 Internet Programming by Carl Franklins, because I can't be bothered typing it all out.

HTH
Ric Mitchell