Window *find_window(Display *display, Window start, const char *name)
{
    Window *children = 0;
    Window root;
    Window parent;
    unsigned int childrenCount = 0;
    XQueryTree(display, start, &root, &parent, &children, &childrenCount);
    
    char *window_name = 0;
    for(int i=0; i<childrenCount; ++i) {
        if(XFetchName(display, children[i], &window_name) == 1) {
            if(strcmp(name, window_name) == 0) {
                XFree(window_name);
                return children[i];
            }
            XFree(window_name);
        }
    }

    for(int i=0; i<childrenCount; ++i) {
        Window *window = find_window(display, children[i], name);
        if(window != 0) {
            XFree(children);
            return window;
        }
    }

    if(children != 0)
        XFree(children);
    
    return 0;
}