nitpick but X11 is the protocol XCB speaks. You're probably speaking of Xlib whi...

destructionator on Nov 3, 2021 | parent | context | favorite | on: How X Window Managers Work, and How to Write One (...

nitpick but X11 is the protocol XCB speaks. You're probably speaking of Xlib which is a bit of a higher level library over the top of it (but... not really that much higher, for a great many tasks there's no real difference).