Ok, RTFM got me here: http://www.winehq.com/site/docs/wineusr-guide/misc-things-to-configure#AEN40...
Will try that and bother you how it works out. ;-)
I managed the redirection to my XPort device.
However, the problem with the slow turnaround remains. When I start the application, I always get the following message, regardless of redirection or not: "fixme:comm:set_queue_size insize 32768 outsize 32768 unimplemented stub" Is that perhaps related?
Jörg