You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dyn_layout_d.rs
    path of file: ./repos/native-windows-gui/native-windows-gui/examples
    
    the code of the file until where you have to start completion: 
use native_windows_gui as nwg;
use native_windows_derive as nwd;

use nwd::{NwgUi, NwgPartial};
use nwg::NativeUi;


#[derive(Default, NwgUi)]
pub struct ConfigDlg {
    #[nwg_control(size: (500, 400), position: (300, 300),
    
fn main() {
    nwg::init().expect("Failed to init Native Windows GUI");
    //nwg::Font::set_global_family("Segoe UI").expect("Failed to set default font");
    let mut font = nwg::Font::default();
    nwg::Font::builder()
        .family("MS Shell Dlg")
        .size(15)
        .build(&mut font)
        .expect("Failed to build font");
    nwg::Font::set_global_default(Some(font));

    let _ui = ConfigDlg::build_ui(Default::default()).expect("Failed to build UI");

    nwg::dispatch_thread_events();
}