Hi Chris and René

Thank you for your guide idea.

Maybe I placed a wrong question before.

My concern is that I cannot distinguish between barcode scanner and keyboard input on itemchanged event of datawindow.

If you have any guide idea, please help

Thanks

Huy

Hi Nguyan;

   This DLL is (was) normally used for serial port communications. If you Google "PowerBuilder mscomm" you should find some good examples.

   Note that you can also do serial port communications via PB's built-in File open, read & write commands.

Regards ... Chris

Hi Nguyen Xuan Huy,

you should describe what you want to do with MSComm OCX to get a precise answer.

To start with OLE:

OleObject lole_comm

TRY

  lole_comm = CREATE OleObject
  li_rc = lole_comm.ConnectToNewObject ("MSCOMMLib.MSComm")
  // check return code

  // use the OCX, e.g.
  lole_comm.CommPort = 2

CATCH (OLERuntimeError errole)

  // catch OLE errors

FINALLY

  // Destroy
  lole_comm.Disconnectobject ()
  DESTROY lole_comm

END TRY

HTH,

René