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Check for Internet Connection
Message
From
20/02/2011 17:01:38
 
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Environment versions
Visual FoxPro:
VFP 9 SP2
OS:
Windows XP SP1
Miscellaneous
Thread ID:
01500982
Message ID:
01501017
Views:
72
Thanks for the link. I don't understand all I know about the referenced thread.... that's another way to say I'm not smart enough to see an answer to my questions on the 2 snippets I posted!
dg

>Check also this thread Re: Internet connection test revival Thread #1498390
>
>>My application checks for an internet connection. Users are not normally on a LAN, but have an individual ISP, dial-up, broadband or air-card.
>>
>>I've found these routines posted previously here.
>>Example 1:
>>
>>Declare Integer InternetCheckConnection In wininet;
>>	STRING lpszUrl, Integer dwFlags, Integer dwReserved
>>#Define FLAG_ICC_FORCE_CONNECTION  1
>>= _check ("http://www.microsoft.com")
>>Procedure _check(lcUrl)
>>gcConnectionStatus = (InternetCheckConnection(lcUrl, FLAG_ICC_FORCE_CONNECTION, 0)=1)
>>oSocket = Createobject("MSWinsock.Winsock")
>>
>>Clear Dlls "InternetCheckConnection"
>>
>>If ! oSocket.LocalIP = "127.0.0.1"
>>	gcIpAddress=oSocket.LocalIP
>>	gcConnectionStatus = 'IP Address'
>>Else
>>	gcIpAddress=''
>>	gcConnectionStatus = 'Not Connected'
>>ENDIF
>>
>>
>>Example 2:
>>
>>Local lcTempFile, loWSH  &&&, gcIPAddress
>>lcTempFile="LocalIP.txt"
>>If File(lcTempFile)		&&erase leftovers from old run
>>	Erase (lcTempFile)
>>Endif
>>loWSH=Createobject("Wscript.Shell")
>>loWSH.Run("command /c ipconfig > "+lcTempFile,0,1)
>>If File(lcTempFile)		&&read the file and parse it
>>	gcIpAddress=Upper(Filetostr(lcTempFile))
>>	gcIpAddress=Substr(gcIpAddress, At('IP ADDRESS',gcIpAddress))
>>	gcIpAddress=Substr(gcIpAddress, At(':',gcIpAddress)+2)
>>	gcIpAddress=Substr(gcIpAddress, 1, At(Chr(13),gcIpAddress)-1)
>>Endif
>>If File(lcTempFile)		&&erase leftovers from old run
>>	Erase (lcTempFile)
>>Endif
>>If Len(Alltrim(gcIpAddress)) = 0
>>	gcConnectionStatus = 'Not Connected'
>>Else
>>	gcConnectionStatus = 'IP Address'
>>Endif
>>
>>
>>My questions are:
>>Is Example # 1 subject to errors related to presence (or absence) of MSWinsock?
>>Is Example # 2 particularly vulnerable to viruses?
>>
>>Thanks.
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