C# write extension unit command into cypress fx3 chip by UVC(1.1ver), USB Port

There is a led on the cypres fx3 chip board. This function is to turn on the LED by pressing the button on the winform. uvc communication (1.1) version Using the extension unit command guidExtensionCode: {63610682-5070-49AB-B8CC-B3855E8D221D} By sending the extension unit command 0x0D through the above GUID, the LED control Since the maximum value is set to 9, the minimum value is set to 0, and the default value is set to 0, Please refer to GET_MIN, GET_MAX, and GET_DEF implementations. If the LEVEL value is set to 1 byte (0x0 ~ 0x9) in SET_CUR operation, IN winform just need one button