Does WinAPI::InternetCheckConnection put a load on the server?

Our program calls InternetCheckConnection every 2 seconds to test whether the program is connected to our server.

We have around 4000 clients running our program. Now the server response is slow, despite its processor is almost idle and the free memory is high enough. Is it possible that InternetCheckConnecti开发者_如何学Con puts a load on our server slowing it down?

I also would be happy to know the details of InternetCheckConnection implementation. MSDN does not tell much.

Thanks, I have eventually found the answer on another MSDN page.

InternetCheckConnection pings the server.

http://msdn.microsoft.com/en-us/library/aa383996%28VS.85%29.aspx