What does the -> operator do?

Using Arduino Programming Questions
1

I'm analyzing a sketch that has sentences like

this->pin=pin

what does "->" mean?

Thanks.

2

(*this).pin

3

Google
member access operator C++

4

aarg:
(*this).pin

Excuse me, but I don't know that the asterisk mean or what it does in the language (besides multiplication).

5

It de-references a pointer.

6

example: let's say we have structure 'myStruct' and let's say 'pinNumber' was a member in the structure.

You can access the member using:
myStruct.pinNumber ( note the period . )

If 'this' is a pointer, you can set it to the address of a function.
struct test myStruct, *this=&myStruct;

These then would be equivalent:
myStruct.pinNumber this->pinNumber (*this).pinNumber