}; // regular public Form8() { combo.AutoSelectOff(); this.Controls.Add(btn3); this.Controls.Add(btn2); this.Controls.Add(btn1); this.Controls.Add(combo1); this.Controls.Add(combo); combo1.Items.AddRange(new Object[] { "Apple", "Banana" }); combo.Items.AddRange(new Object[] { "Apple", "Banana" }); btn1.Click += delegate { combo.Text = "Abcd"; }; btn2.Click += delegate { MessageBox.Show("" + combo.Text); }; btn3.MouseEnter += delegate { if (combo.SelectedText.Length > 0) { MessageBox.Show("" + combo.SelectedText); } }; }