PIbd-32.-Stroev-V.M.-COP/WinFormsLibrary1/WinFormsApp1/Form1.cs

using System;
using System.Windows.Forms;
using WinFormsLibrary1;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void ComboBoxUserControl_SelectedValueChanged(object sender, EventArgs e)
        {
            MessageBox.Show($"ComboBox selected: {comboBoxUserControl.SelectedValue}");
        }

        private void ListBoxUserControl_SelectedValueChanged(object sender, EventArgs e)
        {
            MessageBox.Show($"ListBox selected: {listBoxUserControl.SelectedValue}");
        }
    }
}