private void MFrom_FormClosed(object sender, FormClosedEventArgs e) { if (runbutton.Text != "Open Ovrvision") { //Close ThreadEnd = true; UpdateThread.Join(); if (Ovrvision.Close()) { statelabel.Text = "State : Closed"; runbutton.Text = "Open Ovrvision"; cameraPicRight.Image = null; cameraPicLeft.Image = null; comboBoxTYPE.Enabled = true; buttonSetting.Enabled = false; UpdateThread = null; } } Ovrvision.Release(); }