>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.

That may be but you still need to wait for the response to arrive. You're code doesn't do that....

>
>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.