實現效果：

知識運用：

　　ManagementObjectSearcher類和ManagementObject類

實現代碼：

        private void button1_Click(object sender, EventArgs e)
        {
            ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_VideoController");
            foreach (ManagementObject FlashDeviceObject in searcher.Get())
            {
                textBox1.Text = FlashDeviceObject["Name"].ToString();
                textBox2.Text = FlashDeviceObject["PNPDeviceID"].ToString();
            }
        }

獲取顯示設備的名稱及PNPDeviceID