How to detect operation time-out in mscomm control

[JeffSabat]

where will i place my error checking when there is no terminal connected to comm port?(ex. my program didn't receive any response since there is no power in the terminal) pls help... tnx

 

[paulbent]

Have a look at the OnComm event in the help file. You can put a Select Case statement in this event to handle the error notifications provided by the MSComm control.

You can also use this event to monitor send/receive activity.

Paul Bent
Northwind IT Systems

http://www.northwindit.co.uk

 

[JeffSabat]

tnx for the response Paul. i've tried checking the help file but i've found no information that could help me. Nway, i've read somewhere in this forum sugessting to send a command to the terminal that returns a response. If in a given time(by setting the timer) a response is not receive, it means it could be that there is no terminal connected. What i did in my program was that I prompt an error msg saying "operation timed out" in the timer control event, meaning a response was not receive from the terminal. So far, it works as i want it to happen though i'm still testing it. I hope what i've written here can help others.