Regardless if you are trying to send an Extended Frame, High Voltage Wakeup, orISO9141/KW2K init, the key is the Status Bitfield. The Status Bitfield holds extra information for the message. Each bit of this parameter is a toggle for a different parameter. To send a High Voltage Wakeup, you would set the SPY_STATUS2_HIGH_VOLTAGE bit for your message. For an extended address you would set the SPY_STATUS_XTD_FRAME for the message you want to have an extended address. SPY_STATUS_INIT_MESSAGE is set to send an Initialization waveform with a ISO9141 or Keyword 2000 message.