' FB 1.05.0 Win64

' using bit fields
Type RS232_Pin9
  carrierDetect     : 1 As UByte
  receivedData      : 1 As UByte
  transmittedData   : 1 As UByte
  dataTerminalReady : 1 As UByte
  signalGround      : 1 As UByte
  dataSetReady      : 1 As UByte
  requestToSend     : 1 As UByte
  clearToSend       : 1 As UByte
  ringIndicator     : 1 As UByte
End Type

Print SizeOf(RS232_Pin9)  '' 2 bytes
Sleep