title: Send binary to the serial port
body: <p>To send a serial string character to the serial port.  I would need to call WriteFile(handle, "A", strlen("A"), ...)</p>
  
  <p>However, what if I want to specify and send a hex or binary number?  For example, I want to send WriteFile(handle, 0x41, sizeOf(0x41), ...) ?</p>
  
  <p>Is there a function that allow me to do this?</p>