Suppose I have some function, say in C++

```
int f() {
    // do some stuff
}

```

How do I connect it to a button in some application? It does not need to be a web application per se, it can be a normal desktop application (not a big difference, I guess).

**What all do I need to do to get this function to be called when I press a button in some application?**

---

I guess the question is too vague to be answerable as such.

I am reading the Head First Design Patterns book, and it has a lot of code samples for some dummy apps. Of course all that in is Java. But I am more familiar with C++. So, while reading, I was just wondering how I could possibly get my code connected to some app. What is the general procedure?

For concreteness, how do I connect it to a button on a webpage?