How to write a parser for VK?

Question

C++ / C#

I would like to write a parser for VK that connects to the site's database, takes links from there, follows them and writes a message to his friends (which is also entered from the program). Tell me a resource or or here in the comments, where to start, where to watch, etc.
I write in c#

Answer 1

https://vk.com/dev