Sorry, but I didn't understand exactly what you were attempting to demonstrate in your example.
Please take pity on an admitted moron here and expand a bit on what is going on in the example.

Main questions:
    where does the magic number 211 come from? GEANY_VERSION_CHECK(211...)
        Lex says we're supposed to use API numbers, like 0.19. Please, as a demo, convert that to an int.
        When I try, I get zero. But, like I said, I'm a moron.