>   I'm writing an app to gather data from a serial port, and I'm having
> significant problems with the Communication control in Visual Basic.
> Two separate problems are hitting me:

> 1) If the sending unit is sending when I first use the PortOpen command,
> the computer hangs (hard reboot necessary).

> 2) If I run the program successfully and then exit it, and then run it
> again, the computer hangs (again, hard reboot necessary).

>   I'm wondering if any VB gurus out there have any words of wisdom on
> this topic. I figure the second problem is caused by not resetting the
> port to its original configuration, and yet I haven't seen anything but
> a "Comm1.PortOpen = False" to close a serial port in any samples. Also,
> Microsoft literature doesn't make note of any problems.

>   As for the first problem, I'm guessing I have to somehow clear the
> port of all previous data before I open it. Again, I have no idea how.

>   For reference, I'm running a Pentium 60 with Windows 3.1 and 2 com
> ports, only one of which is in use at any time. I tried switching in
> between them, but the problems remained. If anyone has any idea how to
> fix this, I would be very appreciative if you could send me some email

> Thanks in advance,
> Mike Cating