这是一个多U盘检测程序
if (m.Msg == Native.WM_DEVICECHANGE)
 {  
              
                switch (m.WParam.ToInt32())
                {
                    case WM_DEVICECHANGE:
                        break;
                    case DBT_DEVICEARRIVAL://U盘插入
                        VolumeDeviceClass volumeDeviceClass = new VolumeDeviceClass();
                        foreach (Volume device in volumeDeviceClass.Devices)
                        {
                            if (device.IsUsb)
                            {
                                listBox1.Items.Add(device.LogicalDrive.ToString());
                            }
                        }

                        break;
                    case DBT_DEVICEREMOVECOMPLETE: //U盘卸载
                        break;
                    default:
                        break;
                }
   }
 base.WndProc(ref m);

每当有一个新的优盘插入，都重新遍历一次所有的优盘，我想做的是：
当插入一个新优盘，只检测新插入的优盘，哪位能给指点一点呀？

把之前已检测到的设备记录下来不可以吗？

顶!