C#

foreach (object o in Lstservices.SelectedItems)
            {
                MessageBox.Show(Lstservices.SelectedItem.ToString());
                Lstservices.SelectedItems.Remove(Lstservices.SelectedItem);

            }

public partial class Form1 : Form
{
   [DllImport("cards.dll")]
   private static extern bool cdtInit(ref int width, ref int height);

   public Form1()
   {
      InitializeComponent();

      int width = 12, height = 12;

      if (!cdtInit(ref width, ref height))
         throw new Exception("cards.dll did not load");
   }
}