public static UsbDeviceFinder MyUsbFinder = new UsbDeviceFinder(0x20DF, 0x0001);
// Find and open the usb device.
MyUsbDevice = UsbDevice.OpenUsbDevice(MyUsbFinder);
// If the device is open and ready
if (MyUsbDevice == null) throw new Exception("Device Not Found.");
请参阅下面的屏幕截图,了解我提取 VendorID 和 ProductID 的位置
替代文字 http://img266.imageshack.us/img266/7197/screen1uv.png
那么为什么 USBFinder 一直返回 null 呢?