#Serial Port Ownership
Hi there – Anybody out there have a suggestion, or some code, as to
how I can detect if an application other than my own is using a
serial port? Right now the app I'm trying to fix just makes the
OpenDriver call and takes over the port from anything else that may
be using it in the background. Since all the supporting toolbox
routines seem to require the refNum from OpenDriver, I get the
feeling there's a system global I need to look at. Any help would be
much appreciated. Thanks.