Réponse acceptée !
Tu vas trouver ça sur "SelectedIndexChanged"
this
.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
private void listBox1_SelectedIndexChanged(object sender, System.EventArgs e)
{
ListBox l = (ListBox)sender;
textBox1.Text = l.SelectedItem.ToString();
}
Keikun59
http://blogs.developpeur.org/keikun59