Interception of pressing additional laptop buttons

Question

C++ / C#

I want to write my own software to intercept laptop keystrokes. It is necessary to intercept clicks regardless of the current application or even if nothing is running or inactive (desktop).

Do I need to write a hook, put it in *.dll, and inject into all processes and wait for clicks? Or how?

Please explain the architecture of the application.

Answer 1

Options:
1. You can put a global hook (should be implemented in a dll, global ones do not work in exe), when registering a hook, such a dll will be loaded into all desktop processes.
2. Look towards RIT ( Raw Input Thread ). I have never tried it in practice.
3. Find or write a keyboard filter driver (which is much more difficult). Unlike the first 2 options that work in user mode, it will work in kernel mode.