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Checking for Internet Connection

EE Pros,

I have a Macro that updates MSN Currency when fired.

Is there a way to check to see that a connection exists and if not, notify the user that "No Internet Connection Detected".

Sub CurrencyUpdate()
Sheets("Currency").QueryTables(1).Refresh
End Sub

That's it!

Thank you in advance,

B.

Chris Millard

What you could do is use VBA to check to see if a URL is valid - see this post which contains an example that may be of help:-

http://www.mrexcel.com/forum/excel-questions/567315-check-if-url-exists-so-then-return-true.html

Steven Harris

You can use something like the following code:

Which in short says "If internet is active then refresh data, else notify user..."

Private Declare Function InternetGetConnectedState _
   Lib "wininet.dll" (ByRef dwflags As Long, _
   ByVal dwReserved As Long) As Long
Private Const INTERNET_CONNECTION_MODEM As Long = &H1
Private Const INTERNET_CONNECTION_LAN As Long = &H2
Private Const INTERNET_CONNECTION_PROXY As Long = &H4
Private Const INTERNET_CONNECTION_OFFLINE As Long = &H20
Function IsInternetConnected() As Boolean
    Dim L As Long
    Dim R As Long
    R = InternetGetConnectedState(L, 0&)
    If R = 0 Then
        IsInternetConnected = False
    Else
        If R <= 4 Then
            IsInternetConnected = True
        Else
            IsInternetConnected = False
        End If
    End If
End Function
Sub CurrencyUpdate()
    If IsInternetConnected() = True Then
        Sheets("Currency").QueryTables(1).Refresh
    Else
        MsgBox "No internet connection is detected!"
    End If
End Sub

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SOLUTION