有没有办法用X11/Xt返回父窗口中的所有小部件？

#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Xaw/Label.h>

void print_widgets(Widget widget) {
    WidgetList children;
    Cardinal num_children;

    // 获取父窗口中的所有子部件
    XtVaGetValues(widget, XtNchildren, &children, XtNnumChildren, &num_children, NULL);

    // 遍历并打印每个子部件的名称
    for (Cardinal i = 0; i < num_children; i++) {
        char* widget_name = XtName(children[i]);
        printf("Widget name: %s\n", widget_name);
    }
}

int main(int argc, char** argv) {
    XtAppContext app_context;
    Widget topLevel, parentWidget;

    // 初始化Xt应用程序上下文
    topLevel = XtVaAppInitialize(&app_context, "MyApp", NULL, 0, &argc, argv, NULL, NULL);

    // 创建父窗口
    parentWidget = XtVaCreateManagedWidget("parent", labelWidgetClass, topLevel, NULL);

    // 创建子部件
    Widget childWidget1 = XtVaCreateManagedWidget("child1", labelWidgetClass, parentWidget, NULL);
    Widget childWidget2 = XtVaCreateManagedWidget("child2", labelWidgetClass, parentWidget, NULL);
    Widget childWidget3 = XtVaCreateManagedWidget("child3", labelWidgetClass, parentWidget, NULL);

    // 返回父窗口中的所有小部件
    print_widgets(parentWidget);

    // 运行Xt应用程序
    XtAppMainLoop(app_context);

    return 0;
}