Some times we will get linker errors like below when you are usnig InetIsOffline() Function.
error LNK2019: unresolved external symbol __imp__InetIsOffline@4 referenced in function
To solve this problem add the following code after Header files include.
#pragma comment(lib,"url.lib")
(OR)
Otherwise add "url.lib" in the Linker input of your project settings.
