Checking Internet Connection
The Microsoft WinINet API enables applications to access standard Internet protocols, such as FTP and HTTP.
Many of you want to know if a computer has an active Internet connection before trying to connect to the internet using some communication interface. We can determine it by using one of WinINet function for check the status of internet connection in a computer.
InternetGetConnectedState function retrieves the connected state of the local system. A return value of TRUE from InternetGetConnectedState indicates that at least one connection to the Internet is available.