Hi Brett,

Thanks for your posting. As for the question you mentioned I think there're
serveral means we can do and generally the following two are ok:

1. If you want to check whether your client machine is online or OFFline,
you can consider using some WIN32 api to detect the network status, you can
have a look at the .net's smart client offline application block to see how
it works:

#Smart Client Offline Application Block
http://msdn.microsoft.com/library/en-us/dnpag/html/offline.asp?frame=true

2. If what you want to detect is a particular remote url or site, you can
consider using the HttpWebRequest class to send a simple get request the
the destination url. If that remote service is asseccible you'll get some
info such as success or fail status code.

Thanks.

Regards,

Steven Cheng
Microsoft Online Support