On Wed, 05 Dec 2001 14:04:13 +0000, "T REX" <the1trex@hotmail.com> wrote: >0806d8a0: set_serial_info( handle=132, flags=1, readinterval=ffffffff, >readconst=00000000, readmult=00000000, writeconst=0000000a, Yes, this means that the Api should return immediately. This may apply also to GetOverlappedResult, in this case it could be the reason why the app hangs under Wine and not under Windows. It would be necessary to actually fire up this Win computer and write a test application, of course. Gerard