>>Thanks for your response.
>>
>>What I am doing is similar to what you suggest except I do not need to poll the port since I only want data sent from the device in response to commands I send to it.
>>
>>I can type the following in the command window and get the correct data back from the device.
>>

>>ot = CREATEOBJECT('mscommlib.mscomm')
>>ot.CommPort = 4
>>ot.Settings='115200,n,8,1'
>>ot.PortOpen = .T.
>>lqout = 0hA0A20001B700B7B0B3
>>ot.Output = lqout
>>lqin = ot.Input
>>ot.PortOpen = .F.
>>CREATE CURSOR test (testrec Q(100))
>>INSERT INTO test VALUES(lqin)
>>

>>
>>But when I run the same code in a PRG, the contents of the input buffer are cleared before being assigned to the local varuable.
>>
>>Thanks in advance for any insight.
>
>As they already told you, you have to wait for the response from your device, that means you have to get the data in the OnComm event.
>
>Your code works in the Command Window because by the time you type "lqin = ot.Input" the device has already sent the response data, but in a prg the line "lqin = ot.Input" executes BEFORE the device has sent the data.

I have tried stepping through the code one line at a time, pausing after ot.output = lqout. I can see something appear in the watch window for input but it immediately disappears.

>In the OnComm event:
>
>

>#Define comEvReceive	2	&& Receive event.
>
>*!* Return if we don't have a data event.
>If This.oSerial.Object.CommEvent # comEvReceive
>	Return
>Endif
>
>*!* Get your data here
>

I have tried using the OnComm event but it never fires becuase the value of CommEvent never seems to change.

I appreciate your suggestions.
>
>Carlos Alloatti