C++ getting keyboard adapter when using two keyboards, determine where the keypress come from

I would like to know how to detect the keyboard adapter on Windows when using two keyboards, that a key eg. W was pressed on first or on the second keyboard.

Can anybody help me how to do it? I would like to use a cheap solution for macros. I would plan to bind macros for entrie second keyboard, when somebody press key W (just for example), keybaord would type a world uint8_t.