I have gone through parental control API documentation on MSDN here, posted a general question about using parental controls APIs on Windows 10 here on Stack Overflow. But have not received a satisfactory answer, and haven't been able to locate any helpful samples in the documentation. Right now, I have managed to go as far as this tutorial here.
I decided to narrow down the question to this,
Is there a way to block access to specific websites using these APIs on Windows 10?