How to make an auto-input application for telegram in c#?

Question

C++ / C#

Hello dear. Vocabulary does not allow explaining to Google what I want from it, I came here. I want to try to make an application so that when it starts, it writes certain messages to the bot in the telegram. So to speak, a mini-fluder with advanced settings.
Question: how can I make the application look for the input place and write words there?
I will be glad to any article, advice, direction and the like. And I don't even know where to go.