private void Cities_SelectedIndexChanged(object sender, EventArgs e)//"EventArgs - an event handler" { //Whenever an item is selected in the Cities groupbox, a message box //will pop up with the selected item string text = Cities.GetItemText(Cities.SelectedItem);//Getting the selected list item . //The method "GetItemText" gets the the actual value //of the selected item (inside the "Cities"), //then it's assigned to the "text" variable... MessageBox.Show(text);//MessageBox to show the value //Playing with it : MessageBox.Show("Stas");//MessageBox to show the value }