To get the character that terminated the last call to READCOMMDEVICE@.
INTEGER (KIND=3) PORTNUM
character that terminated the last READCOMMDEVICE@ call. This will be one of
the characters set using SETCOMMTERMINATECHAR@. If the port is not open the
function returns 1. If READCOMMDEVICE@
has not been called the default return is zero.
To access this routine you need to provide a definition by, for
example, including the file clearwin.ins or by using the MSWIN module.