Codejock Developer Community : Internet Detection http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 21 Apr 2026 15:31:27 +0000 Wed, 01 Jul 2009 14:02:01 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=14587 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Internet Detection : You might want to try GetAddrInfo()...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50544&title=internet-detection#50544 Author: Smucker
Subject: 14587
Posted: 01 July 2009 at 2:02pm

You might want to try GetAddrInfo() for several known hosts. This willavoid connecting to anything but the DNS server(s). Unfortunately, ifthe DNS server is on a local network system, or all addresses are cached (there or on your local system) it might give back a validaddress even though outbound connections are down.

You might want to experiment with sending it invalid or reserved IPV4 addresses; these may force a connection to a real (external) DNS server, and the error returns may be different depending on the local system's (or local network's) actual connection to the internet. I haven't experimented with that.

]]> Wed, 01 Jul 2009 14:02:01 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50544&title=internet-detection#50544 <![CDATA[Internet Detection : tralfaz wrote:but what if Google.com...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50416&title=internet-detection#50416 Author: terrym
Subject: 14587
Posted: 28 June 2009 at 10:30am

Originally posted by tralfaz tralfaz wrote:

but what if Google.com goes away (just kidding, haha)

Nice and simple, I'll give it a shot. Thank you,  Tra
 
Personally we check 3 main sites: Google, Microsoft and Yahoo to make sure ;)
]]> Sun, 28 Jun 2009 10:30:40 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50416&title=internet-detection#50416 <![CDATA[Internet Detection : Hi Sorry not had chance as...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50399&title=internet-detection#50399 Author: terrym
Subject: 14587
Posted: 27 June 2009 at 10:20am

Hi
 
Sorry not had chance as been trying to fix white theme.  However will definately try this on monday, thanks
]]> Sat, 27 Jun 2009 10:20:59 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50399&title=internet-detection#50399 <![CDATA[Internet Detection : In my own software, I keep my...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50339&title=internet-detection#50339 Author: znakeeye
Subject: 14587
Posted: 26 June 2009 at 6:30am

In my own software, I keep my WINVER set to 0x500, but I don't perform any tests on Win2k. That is, it should work in Win2k, but no guarantees. I think it's fair enough.
 
 
Did you test the function in my previous post?
]]> Fri, 26 Jun 2009 06:30:31 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50339&title=internet-detection#50339 <![CDATA[Internet Detection : How about this? IsNetworkAlive(NETWORK_ALIVE_WAN)...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50337&title=internet-detection#50337 Author: znakeeye
Subject: 14587
Posted: 26 June 2009 at 5:45am

How about this?
 
IsNetworkAlive(NETWORK_ALIVE_WAN)
]]> Fri, 26 Jun 2009 05:45:28 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50337&title=internet-detection#50337 <![CDATA[Internet Detection : http://www.gershnik.com/faq/manage.asp#internet...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50332&title=internet-detection#50332 Author: znakeeye
Subject: 14587
Posted: 26 June 2009 at 5:22am

http://www.gershnik.com/faq/manage.asp#internet]]> Fri, 26 Jun 2009 05:22:14 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50332&title=internet-detection#50332 <![CDATA[Internet Detection : znakeeye wrote: I believe...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50326&title=internet-detection#50326 Author: terrym
Subject: 14587
Posted: 26 June 2009 at 5:08am

Originally posted by znakeeye znakeeye wrote:

I believe this is the right way of doing this:
InternetCheckConnection(NULL, FLAG_ICC_FORCE_CONNECTION, 0);
 
Who uses OS < Win2k??
 
We have also tried this method and it must have also failed in some circumstances.  However yes I agree our applications require Windows 2000 (SP4+) and soon we will even drop Windows 2000 support.
 
]]> Fri, 26 Jun 2009 05:08:41 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50326&title=internet-detection#50326 <![CDATA[Internet Detection : I believe this is the right...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50325&title=internet-detection#50325 Author: znakeeye
Subject: 14587
Posted: 26 June 2009 at 5:05am

I believe this is the right way of doing this:
InternetCheckConnection(NULL, FLAG_ICC_FORCE_CONNECTION, 0);
 
Who uses OS < Win2k??
]]> Fri, 26 Jun 2009 05:05:05 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50325&title=internet-detection#50325 <![CDATA[Internet Detection : znakeeye wrote:You&#039;re...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50324&title=internet-detection#50324 Author: terrym
Subject: 14587
Posted: 26 June 2009 at 5:04am

Originally posted by znakeeye znakeeye wrote:

You're right.
"A return value of TRUE from InternetGetConnectedState indicates that at least one connection to the Internet is available. It does not guarantee that a connection to a specific host can be established."
 
Have to do some research here. It seems odd that such a simple task is that hard...
 
Tell us about it, we had trouble finding a solution for a task that should have been very simple.  Then we stumbled upon the method we use as above, which has worked perfectly but like you say we'd prefer a better solution.
 
]]> Fri, 26 Jun 2009 05:04:21 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50324&title=internet-detection#50324 <![CDATA[Internet Detection : znakeeye wrote:Also, you might...]]> http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50323&title=internet-detection#50323 Author: terrym
Subject: 14587
Posted: 26 June 2009 at 5:02am

Originally posted by znakeeye znakeeye wrote:

Also, you might want to check some firewall settings before firing up a homepage etc. If you don't, some users will block your application. I believe the best approach is to notify the user before connecting to the Internet the first time.
 
 
Cool we will add this to our range of software over the coming months as a great idea.
 
]]> Fri, 26 Jun 2009 05:02:32 +0000 http://forum.codejock.com/forum_posts.asp?TID=14587&PID=50323&title=internet-detection#50323