Can I use Mobile Broadband api to Send AT Command?

Question

    I want to send AT Command('ATI') to get WWAN Information Using MBNAPI.  Now I can use IMbnDeviceService::OpenCommandSession to  connect MBN Device . how to set the parameters of setcommand()? or Example.

commandID=?     string "ATI" to  deviceServiceData,

HRESULT SetCommand(
  [in] ULONG commandID, [in]   SAFEARRAY(BYTE) deviceServiceData,
  [out]  ULONG *requestID
);