How to know Hex Code ?

Hello everyone!
First of all, I want to apologize for my very bad english, I’m french.

So, I have an Arduino Uno with an IR Control Remote pack and I want to know the codes which are corresponding with the buttons of the remote control. I’ve bought this one : , I think it is well-known.
If you could help me,

I am assuming that you want to know the codes that will be sent to the receiver?

If no-one supplied you with this information,m then and easy way to find out is to write a small sketch that will simply display the codes it receives. Just read the code and write it to the serial output. Then you can make your own list of which button has which code.

Thanks for your answer.