how to connected to the Internet and change system date/time?

Hello
I want to know if my computer is currently connected to the Internet.
So I'm looking for several related functions. But I could not find it.

And I want to change the date/time on my computer. I have tried the following functions:

SetSystemDate();
SetSystemTime();

I changed it on my development PC. However, after making it as a distribution, it was not changed on the Panel PC.
The OS of the Panel PC is Windows 7 Embeded.
I want to know if there is another way to change the date and time.

Thank you.