Function xcb::ffi::xproto::xcb_query_tree

pub unsafe extern "C" fn xcb_query_tree(
    c: *mut xcb_connection_t, 
    window: xcb_window_t
) -> xcb_query_tree_cookie_t

query the window tree

Gets the root window ID, parent window ID and list of children windows for the specified window. The children are listed in bottom-to-top stacking order.