The get_xlib_window returns a value that is defined by the X11 API to be Wffi::indow (which is a typedef to c_ulong), but casts it to *mut c_void.

Likewise, get_xlib_screen_id returns a value defined by the X11 API to be a c_int, but casts it to *mut c_void.

My understanding of the X11 API is very light, but this seems wrong to do so, especially given depending on the architecture, these types are not guaranteed to even be the same size.

Do you have some insight regarding this @Ralith ? (pinging you as you seem to have a fair amount of knowledge of X11)