Does anybody know how to test if a ComPort (serial) is already
in use within a PB/DOS 3.5 program? I tried the same approach
I use with my 32-bit (PB/DLL 6.0) programs, that is, by trying
to open the port, then testing the ERRCLEAR var. This does NOT
work in PB/DOS 3.5. My ON ERROR GOTO <label> is NOT invoked in
the PB/DOS test program I wrote, even when it tried to open a
port that was definitely in use.

Any ideas?

Cordially,

Clay C. Clear